Solve the problem.A swimming pool has a rectangular base 10 ft long and 20 ft wide. The sides are 4 ft high, and the pool is full of water. How much work will it take to lower the water level 2 feet by pumping the water out over the top of the pool? Assume that the water weighs
Give your answer to the nearest ft ? lb.
A. 199,680 ft ? lb
B. 12,480 ft ? lb
C. 24,960 ft ? lb
D. 99,840 ft ? lb
Answer: C
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A.
B.
C.
D.
Solve.Martha can rake the leaves in her yard in 5 hours. Her younger brother can do the job in 6 hours. How long will it take them to do the job if they work together?
A. 2 hr
B. hr
C. 6 hr
D. 30 hr
Solve the equation by the square root property.(4x + 3)2 - 6 = 0
A.
B.
C.
D.
To travel 76 miles, it takes Sue, riding a moped, 3 hours less time than it takes Doreen to travel 84 miles riding a bicycle. Sue travels 7 miles per hour faster than Doreen. Find the times and rates of both girls.
A. Sue: 19 mph for 4 hours, Doreen: 12 mph for 7 hours B. Sue: 12 mph for 4 hours, Doreen: 19 mph for 7 hours C. Sue: 23 mph for 8 hours, Doreen: 16 mph for 11 hours D. Sue: 4 mph for 19 hours, Doreen: 12 mph for 7 hours E. Sue: 29 mph for 4 hours, Doreen: 22 mph for 7 hours