Answer:
radius of the sphere (r) = 21 units
Step-by-step explanation:
here's the solution : -
=》
=》
( pi cancel out )
=》
=》
Romeo paid $380.75 in car repairs. The sales tax rate is 10%. Which of the following is a reasonable estimate of the tax Romeo
1 answer:
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Answer: C
Step-by-step explanation:
To find the surface area of a cone, you use the formula . Since we are already given the height and radius, all we have to do is plug in the values and solve.
[solve inside of square root]
[parenthesis]
[multiply]
Therefore, the closest answer is C.
Answer:
20 mph and 4 mph
Step-by-step explanation:
GIVEN: A boat travels upstream for miles in
hours and returns in
hours traveling downstream in a river.
TO FIND: What is the rate of the boat in still water and the rate of the current.
SOLUTION:
Let the speed of boat in still water be and speed of current be
.
speed of water in upstream
speed of water in downstream
As
Solving both we get
Hence speed of boat in still water and rate of current is 20mph and 4mph respectively.