Solve the problem.An arch in the form of a semiellipse is 52 ft wide at the base and has a height of 20 ft. How wide is the arch at a height of 12 ft above the base?
A. 41.6 feet
B. 20.8 feet
C. 17.7 feet
D. 35.5 feet
Answer: A
Mathematics
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Solve the problem.From a point on a river, two boats are driven in opposite directions, one at 8 miles per hour and the other at 9 miles per hour. In how many hours will they be 51 miles apart?
A. 3 hr B. 1 hr C. 5 hr D. 4 hr
Mathematics
For the given rectangular equation, write an equivalent polar equation.x2 + y2 - 4x = 0
A. r = 4 cos ? B. r sin2? = 4 cos ? C. r = 4 sin ? D. r cos2? = 4 sin ?
Mathematics
A formula is given, along with values for all but one of the variables in the formula. Find the value of the variable that is not given.I = prt; I = 142.1, p = 290, r = 0.07
A. t = 0.7 B. t = 7 C. t = 2884.63 D. t = 28.8463
Mathematics
Perform the indicated operations. Simplify if possible.
+ 
- 
A. 
B. 
C. 
D. 
Mathematics