Solve.Suppose that Q is jointly proportional to R and the square of S. If Q = 64 when R = 2 and S = 4, find Q when R = 5 and S = 3.
A. 18
B. 90
C. 30
D. 10
Answer: B
Mathematics
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Solve the given applied problems involving variation.The distance to the horizon varies directly as the square root of the height above ground level of the observer. If a person can see 6 miles from a height of 25 feet, how far can a person see from a height of 121 feet?
A. 13.2 miles B. 13.5 miles C. 12.1 miles D. 14.4 miles
Mathematics
Find the first year's depreciation, using the double-declining-balance method. Round to the nearest dollar.Cost: $54,000Est. life: 20 yearsEst. scrap: $5,000
A. $5,400 B. $2,450 C. $4,900 D. $2,700
Mathematics
Divide.
A. 2 R 4 B. 3 C. 4 D. 2 R 5
Mathematics
Multiply or divide by moving the decimal point.0.4099 × 10,000
A. 409.9 B. 4099 C. 1000.4099 D. 0.40990000
Mathematics