Solve the problem.A balloon (in the shape of a sphere) is being inflated. The radius is increasing at a rate of 11 cm per second. Find a function, r(t), for the radius in terms of t. Find a function, V(r), for the volume of the balloon in terms of r. Find (V ? r)(t).
A. (V ? r)(t) = 
B. (V ? r)(t) = 
C. (V ? r)(t) = 
D. (V ? r)(t) = 
Answer: B
Mathematics
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Find the slope of the line passing through the two given points.(-6, -7) and (-2, 8)
A. - 5
B. - 
C. 
D. 
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Multiply.(x + 6y)(x - 9y)
A. x2 - 3xy - 54y2 B. x2 - 3xy - 3y2 C. x - 3xy - 54y D. x2 - 6xy - 54y2
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Solve.The temperature was 61°F in the morning, but it dropped 19°F in the afternoon and another 5°F in the evening. What was the temperature in the evening?
A. 37°F B. -47°F C. -37°F D. 47°F
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Toothpicks can be arranged to form triangles as shown below. How many toothpicks are required to form a triangle with ten toothpicks on a side?
Mathematics