Solve the problem.The diagram below shows a rope connecting the top of a pole to the ground. The rope is 21 yd long and touches the ground 18 yd from the pole. How tall is the pole? Round approximations to the nearest tenth. 
18 yd
A. 19.5 yd
B. 5.4 yd
C. 58.5 yd
D. 10.8 yd
Answer: D
Mathematics
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The amount L, in liters, of liquid remaining in a tank after t hours satisfies the equation of change 
. How much liquid is in the tank after a long time?
?
A. 6 liters B. 42 liters C. 1.17 liters D. 7 liters
Mathematics
Solve the problem.Estimate the minimum number of subintervals needed to approximate the integral
with an error of magnitude less than 10-4 using the Trapezoidal Rule.
A. 448 B. 92 C. 259 D. 130
Mathematics
Evaluate the expression.
?
Fill in the blank(s) with the appropriate word(s).
Mathematics
Add the numbers.46 + 55
A. 101 B. 102 C. 100 D. 91
Mathematics