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Tutors Answer Your Questions about Length-and-distance (FREE)
Question 727392: Two metallic solid right circular cones have same height h.The radii of their base are r1 and r2. The two cones are melted together and recast into a solid right circular cylinder of height h.Show that the radius of the base of the cylinder is sqrt (1 upon 3 r1^2 + r2^2 )
Click here to see answer by mananth(16946)   |
Question 728807: Hello. My question: prove that thesegment connecting the midpoints of legs of an isosceles trapezoid is parallel to the bases of the trapezoid. I know the slope formula but I do not know what to put in the equation. I think we are supposed to use variable coordinates. Thanks!
Click here to see answer by josgarithmetic(39617) |
Question 729352: John is doing some research for his biology homework, he reads that an average bacterial cell is about 0.000001 metres.
(a) write 0.000001 metres in Standard form. ...............m
a red blood cell is 7 times larger than an average bacterial cell.
(b) write the length in metres of a red blood cell in standard form. ........m
a flu virus is aabout 1 x 10 -7m long
(c) how many times longer than a flu virus is a red blood cell? .......m
Click here to see answer by lynnlo(4176) |
Question 729346: on my way to work on monday, i drove at an average speed of x mph, my journey to work is 30 miles long.
(a) write an expression in terms of x for the time that my journey on monday took in hours?
On tuesday my journey was half an hour shorther than on monday.
(b) write an expression in terms of x for the tome that my journey on tuesday took in hours?
My journey on tuesday took 1 hour.
(c) Use this information to find the value of x x=...........mph
If i keep in creasing my average speed by the same amount each day, will my journey take me half an hour less each day?
(d) Explain your answer.
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Click here to see answer by lynnlo(4176) |
Question 730134: Over the break, Justin took a road trip from here to point B and averaged 36 mph. On Wednesday, he went from point B to point C and averaged 60 mph. The trip from point B to point C was 24 miles longer and took 18 minutes less than his trip from here to point B. How many miles was the trip from here to point B?
Click here to see answer by lynnlo(4176) |
Question 730974: A ball is thrown upward from the top of a building. The ball's height above the ground after t seconds is given by the function: h (t) = -16t^2 + 48t + 32.
a.) What is the initial height?
b.) How high did the ball go?
c.) When does the ball hit the ground?
Click here to see answer by richwmiller(17219)  |
Question 731820: 7 teams are in the Christmas Basketball Tournament. Each team will play each other only once.
~ graph a network of the tournament
~ how many games were played in total?
~ if 2 more teams were added to the tournament list, how many games would then be played?
~ show your work and explain your answer
Click here to see answer by lynnlo(4176) |
Question 733916: Triangle ABC has vertices A(-2,3), B(-3,1), and C(-1,2). What are the vertices of A'B'C' after the triangle is rotated 180 degrees about the origin?
So far, what I have done was only state the type of coordinates that a rotation of 90 degrees and 180 degrees would make.
90 degrees rotation= (x,y) to (-y,x)
180 degrees rotation= (x,y) to (-x,-y)
Click here to see answer by stanbon(75887) |
Question 739578: Farmer Fred wants to fence in a rectangular pasture that is bordered on one side by a river. He plans to use 7200 feet of fence to enclose the other three sides. What should the length of the pasture be if the enclosed area is to be a maximum?
Click here to see answer by richwmiller(17219) |
Question 739578: Farmer Fred wants to fence in a rectangular pasture that is bordered on one side by a river. He plans to use 7200 feet of fence to enclose the other three sides. What should the length of the pasture be if the enclosed area is to be a maximum?
Click here to see answer by Alan3354(69443)  |
Question 742761: Hello all having trouble figuring this problem out. Using only 1 variable and writing an inequality to come up with a solution how would I do this problem.
The length of a rectangular boat storage shed must be 4 meters more than the width . The perimeter must be at least 120 meters. What widths of the shed will make the perimeter at least 120 meters?
Click here to see answer by nerdybill(7384)  |
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