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Question 1087514: An arrow is shot vertically with an initial speed of 25m/sec can be approximated by the function h(t)=-5t^2+25t where h(t) is the height of the arrow (in meters) and t is the time after release of the arrow (in seconds)
a) how high is the arrow after 2.5 secs?
b) how long does it take the arrow to return to the ground
Click here to see answer by ikleyn(52781)

Question 1087511: The length of a rectangle is 4 more than its width. Write a polyminial expression for the area of the rectangle. Write your answer in simplest form.
Click here to see answer by ikleyn(52781)

Question 1087520: This problem isn't exactly Algebra, but I need help desperately!
Determine the limit of f(x) as x approaches infinity and negative infinity for the following function. Also give the horizontal asymptote of f (if any).
f(x) =
Click here to see answer by josgarithmetic(39617)

Question 1087539: Find the amount that results from the given investment.
$20 invested at 8% compounded continuously after a period of 2 years
After 2 years, the investment results in $?
(round to the nearest cent as needed)
Click here to see answer by mathmate(429)

Question 1087538: Find the amount that results from the given investment.
$300 invested at 9% compounded daily after a period of 2 years
After 2 years, the investment results in $?
(round to the nearest cent as needed)
Click here to see answer by mathmate(429)

Question 1087553: How to solve this quadratic equation with the quadratic formula?:
x2 + 2x = 8

So far this is what I got:

-2�√-28
-----------
2

However I'm not too sure what to do next, help?
Click here to see answer by Fombitz(32388)

Question 1087537: Find the amount that results from the given investment.
$200.00 invested at 10% compounded quarterly after a period of 3 1/2 years
After 31/2 years, the investment results in $?
(Round to the nearest cent as needed)
Click here to see answer by mathmate(429)

Question 1087536: Find the amount that results from the given investment.
$200.00 invested at 6% compounded quarterly after a period of 4 years
After 4 years, the investment results in $?
(Round to nearest cent as needed)
Click here to see answer by mathmate(429)

Question 1087535: The size P of a certain insect population at time t (in days) obeys the function p(t)=700e^0.05t
a)Determine the number of insects at t=0 days.
b)What is the growth rate of the insect population?
c)What is the population after 10 days?
d)When will the insect population reach 1050?
e)When will the insect population double?
Click here to see answer by mathmate(429)

Question 1087531: Prove that n combination r is equal to( n combination (n minus r).

Click here to see answer by mathmate(429)

Question 1087599: Find the exact value of tan 60�. Use a half-angle identity.
Click here to see answer by ikleyn(52781)

Question 1087602: Find the value in radians of cos^�1 (�1).
Click here to see answer by ikleyn(52781)

Question 1087597: Find the value in radians of sin^�1 (�1.0).

Click here to see answer by ikleyn(52781)

Question 1087596: Write this measure in radians: 475�.
Click here to see answer by MathLover1(20849)

Question 1087581: Can you please explain the process of how to determine if the function is continuous at 5?
Click here to see answer by ikleyn(52781)

Question 1087583: I need help with this problem:
Determine if the following function is continuous at a.
f(x) = a = 1
Click here to see answer by ikleyn(52781)

Question 1087606: Find the probability of this trial, x = 8, n = 11, p = 0.9, where x is successes in n trials.
Click here to see answer by mathmate(429)

Question 1087644: Find the principal needed now to get the given amount, that is, find the present value.
To get $90 after 1 1/2 years at 6% compounded continuously
The present value of $90 is $?
(round to the nearest cent as needed)
Click here to see answer by mathmate(429)

Question 1087642: Find the principal needed now to get the given amount, that is, find the present value.
To get $3000 after 33/4 years at 5% compounded daily
The present value of $3000 is $?
Click here to see answer by mathmate(429)

Question 1087641: Find the principal needed now to get the given amount, that is, find the present value.
To get $200 after 3 years at 10% compounded monthly
The present value of $200 is $?
Click here to see answer by mathmate(429)

Question 1087645: What rate of interest compounded annually is required to double an investment in 3 years?
The rate of interest required is ?%
(Round two decimals as needed)
Click here to see answer by jorel1380(3719)

Question 1087643: Find the principal needed now to get the given amount, that is, find the present value.
To get $500 after 3 years at 5% compounded quarterly
The present value of $500 is $?
Click here to see answer by rfer(16322)

Question 1087646: Suppose the cost C, in dollars, of eliminating p percent of the pollution from the emissions of a factory is given by
C(p) =4800p/100-p
What type of function is this?
Given that p represents the percent of pollution removed, what is the domain of C(p)
Find C (0) and interpret its meaning. it costs nothing to remove pollution
Find the cost of removing 99% of the pollution
PLEASE SHOW WORK AND CHECKS FOR EACH QUESTION IF POSSIBLE. THANK YOU
Click here to see answer by ikleyn(52781)

Question 1087681: I need some help:
a) for the following function and values of a, find f '(a)
b) Determine an equation of the line tangent to the graph of f at the point (a, f(a)) for the given value of a.
F(x) = ; a = -2
Click here to see answer by josmiceli(19441)

Question 1087699: Solve this equation for 0≤θ≤2 : 2 cos θ+√3 =0.
A. 2π/3
B. 5π/6
C.π/6

Click here to see answer by ikleyn(52781)

Question 1087695: Find the exact value of cos 15�. Use the sum or difference identity.
A. √2/4
B.√6
C.√6 + √2 / 4
Click here to see answer by ikleyn(52781)

Question 1087695: Find the exact value of cos 15�. Use the sum or difference identity.
A. √2/4
B.√6
C.√6 + √2 / 4
Click here to see answer by Alan3354(69443)

Question 1087697: Evaluate this expression in radians: cot 1.
a. 0.7854
b. 1.5574
c. 0.6421
Click here to see answer by Alan3354(69443)

Question 1087703: Find the margin of error for the sample size, n = 1000.
a. �3%
b. �4%
c. �5%
Click here to see answer by MathLover1(20849)

Question 1087702: Find the margin of error for the sample size, n = 500.
a. �5%
b. �4%
c. �6%

Click here to see answer by MathLover1(20849)

Question 1087694: Use the binomial expansion of (p + q)^n to calculate n = 5 and p = 0.3.
a. 0.15 + .006807 + 0.03045 + 0.26537 + 0.197373 + 0.35
b. 0.00243 + 0.02835 + 0.1323 + 0.3087 + 0.36015 + 0.16807
c. 0.00243 + .0.02835 + 0.2646 + 0.3697 + 0.20105 + 0.13397

Click here to see answer by ikleyn(52781)

Question 1087739: find the lowest natural number which when divided by 112, 140, and 168 leaves a remainder 8 in each case.
Click here to see answer by ankor@dixie-net.com(22740)

Question 1087701: Solve this equation for 0≤ θ ≤ 2π :4 cos θ = 3.
a. 0.1559, 4.3872
b. 0.7227, 5.5605
c. 0.8, 6.8
Click here to see answer by Alan3354(69443)

Question 1087691: Solve this equation for 0 ≤ θ ≤ 2 : sin θ cos θ + cos θ = 0.
a. π/2, 3π/2
b.0, π
c.π/2, -1
Click here to see answer by math_helper(2461)

Question 1087788: a school has 40 teachers. the ratio of the female teachers to the number of male teachers at the school is 5:3. how many teachers does the school have?
Click here to see answer by ikleyn(52781)

Question 1087789: a school has 40 teachers. the ratio of the female teachers to the number of male teachers at the school is 5:3. how many male teachers does the school have?
Click here to see answer by ikleyn(52781)

Question 1087792: write 2,125 as an ordinary or mixed fraction in its simplest form ?
Click here to see answer by ikleyn(52781)

Question 1087792: write 2,125 as an ordinary or mixed fraction in its simplest form ?
Click here to see answer by math_helper(2461)

Question 1087812: Andrew has half the app's of Stuart and Stuart has half the app as Meera and all together they have 140 app so Meena ,Stuart and Andrew have how many apps
Click here to see answer by ikleyn(52781)

Question 1087811: Andrew has half the app's of Stuart and Stuart has half the app as Meera and all together they have 140 app
Click here to see answer by ikleyn(52781)

Question 1087855: Determine the lowest common multiple of the following three terms:
xy, x^2 and xy^3
Click here to see answer by Edwin McCravy(20055)

Question 1087852: simplify the following expression as far as possible:
√36x^36
Click here to see answer by ankor@dixie-net.com(22740)

Question 1087853: simplify the following expression as far as possible:
(2xy^2)^3�3x^2y^3x9x^3y^2
Click here to see answer by ikleyn(52781)

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