Solve the problem.A boat is 180 feet from the base of cliff. If the distance from the top of the cliff to the boat is 45 more than twice the height of the cliff. Find the height of the cliff. Round to the nearest tenth of a foot if necessary.
A. 135 ft
B. 75 ft
C. 100.6 ft
D. 45 ft
Answer: B
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Perform the indicated operation.(-14a3 + 6a2) - (17a3 - 20a2)
A. -31a3 + 26a2 B. -5a5 C. -31a3 - 14a2 D. 3a3 - 14a2
Find the area of the shaded region in the figure. Round results to the nearest unit. Use ? ? 3.14.
A. 194 m2 B. 204.5 m2 C. 168 m2 D. Not enough information given
Solve the problem.A cup of coffee is heated to 194° and is then allowed to cool in a room whose air temperature is 
After 11 minutes, the temperature of the cup of coffee is 
Find the time needed for the coffee to cool to a temperature of 102°. Assume the cooling follows Newton's Law of Cooling: U = T + (Uo - T)ekt.(Round your answer to one decimal place.)
A. 29.7 minutes B. 26.4 minutes C. 41.1 minutes D. 15.1 minutes
Simplify the expression, if possible.log7 73
A. 3 B. -21 C. 343 D. -7