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Question 1167023: 20. The height of a football is given β(π‘)=β4.9π‘2+18π‘+0.8 where β(π‘) is
the height (in metres) and π‘ is the time (in seconds) from when the
punter kicked the ball. The height of a blockerβs hands is modelled by
the equation π(π‘)=β1.43π‘+4.26. Can the blocker knock down the
punt? If so, at what point will it happen?
Click here to see answer by ikleyn(52778)  |
Question 1167070: The student council is hosting a drawing to raise money for scholarships. They are selling tickets for $8 each and will sell 500 tickets. theire is one $3,000 grand prize, three $500 second prizes, and elecen $30 third prizes. You just bought a ticket. Find the expected value for your profit.Round to the nearest cent.
Click here to see answer by greenestamps(13198)  |
Question 1167167: Would you check my answers below to see if I have identified the chemical reactions correcly?
Match these items with type of chemical reaction shown below them?
I have indicated below what my answers are - could you verify?
___E__ HNO^3 + CsOH ------- CsNO^3 + H^20
___A__ H^2 + Ci^2 ------ 2HCI
___B__ NH^4OH ------- NH*3 + H^20
___C__ 2K + Na^2CO^2 -------- K^2CO^3 + 2Na
___D__ K^2SO^4 + 2NaCI -------- 2KCI + NaSO^4
A - Synthesis reaction
B - Decomposition reaction
C - Single substitution reaction
D - Double substitution reaction
E - Neutralization reaction
Thank you
Click here to see answer by ikleyn(52778)  |
Question 1166931: IQ scores are normally distributed with a mean of 100 and a standard deviation of 15. Mensa is the largest, oldest, and most famous high-IQ society in the world. The organization restricts its membership to people with high testable IQs. Specifically, potential members must score within the top 2% of any approved standardized intelligence test. What IQ is required to become a member of Mensa?
Click here to see answer by VFBundy(438)  |
Question 1167436: Shirley is combining two nut mixtures to create a new mixture. Both mixes are a combination of peanuts and almonds. The first mixture is 40% almonds and the second is 25% almonds. How much of each mixture should Shirley combine to make 6 kg of a mixture of 33% almonds?
Click here to see answer by josgarithmetic(39617) |
Question 1167436: Shirley is combining two nut mixtures to create a new mixture. Both mixes are a combination of peanuts and almonds. The first mixture is 40% almonds and the second is 25% almonds. How much of each mixture should Shirley combine to make 6 kg of a mixture of 33% almonds?
Click here to see answer by greenestamps(13198)  |
Question 1167622: It costs a pretzel vendor $20 per day to rent a cart and $0.75 for each pretzel.
(A) Find the cost of selling x pretzels in 1 day.
(B) What is the cost of selling 150 pretzels in 1 day?
(C) If the daily cost is $275, how many pretzels were sold that day?
Click here to see answer by Theo(13342)  |
Question 1167593: In purchasing a house worth 30,000 dollars cash, a man pays 10,000 dollars cash and agreess to make equal payments at the end of each 3 months for 12 years, to discharge all principal amd interest at 8% compounded quarterly. Find his periodic payments.
Click here to see answer by Theo(13342)  |
Question 1167942: Brianna, Ryan, Tyler, and Ashley were recently elected as the new class officer (president, VP, Secretary, Treasurer). From the Following clues, determine which position each holds.
A. Ashley is younger than the president but older than the treasurer.
B. Brianna and the secretary are both same age, and they are the youngest members of the group.
C. Tyler and the secretary are next-door neighbors.
With complete explanation please.Thanks in advance.
Click here to see answer by VFBundy(438)  |
Question 1168258: In a class, all students take part in either music or drama or both. 25 students take part in music, 30 students take part in drama and 8 students take part in both music and drama. Find the number of students who take part in only music.
Click here to see answer by greenestamps(13198)  |
Question 1168566: It's well established that lab rats require, on average, 32 trials before reaching a criterion of 3 consecutive errorless trials in a complex water maze. To determine whether a mildly painful stimulus has any effect on performance, a sample of twelve rats were given a mild electrical shock just before each trial. They required the following number of trials before reaching the criterion: 35, 37, 38, 34, 32, 31, 35, 29, 30, 35, 35, 39. Does the mild shock affect the rats performance?
Questions are: 1. Statistical Hypotheses?
2. Reject the null hypothesis at the .05 level of significance if t β₯ __ or or t β€ __ given __ df.
3. Given that the mean of the sample is 34.17 with a sample standard deviation of 3.13, calculate the one sample t test by hand.
4. What is your decision?
5. How do you interpret your decision?
Click here to see answer by Boreal(15235)  |
Question 1169239: Consider a proper fraction such that the numerator is 2 less than the denominator. If the
numerator and denominator are each increased by 1, then the ratio of the numerator and
denominator of the new fraction is 4:5. Determine the original fraction
Click here to see answer by josgarithmetic(39617) |
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