The sun is 93 million miles from Earth and light travels at a rate of 186,000 miles per second. How long does it take for light from the sun to reach the Earth?
Answer(s): D
Use the time formula T = S ÷ V, where T = time, S = displacement, V = velocity. Time (T) = 93 million miles (S) ÷ 186,000 miles per second (V) = 500 second. 500 second = 81⁄2 minutes.
A tanning-bed pass for unlimited tanning costs $53 per month this year, but it was only $50 per month last year.What was the percentage of increase?
Answer(s): C
The difference in the price is $3. $3 ÷ $50 = 0.06 or 6%
Eleven plus forty-one is divided by a number. If the result is 13, what’s the number?
Answer(s): B
11 + 41 =52Calculate each answer option to figure out the Answer 52 ÷ 2 = 2652 ÷ 4 = 1352 ÷ 6 = 8,6752 ÷ 8 = 6,5
Mark received an hourly wage of $9.25. His boss gave him a 4% raise. How much does Mark make per hour now?
To calculate the new wage, start off by taking $9.25 × 0.04 = $0.37. Then add that number (the amount of Mark’s raise) to his original hourly wage. Mark’s new hourly wage is $9.25 + $0.37 = $9.62.
How many pounds of nails costing $7 per pound must be mixed with 6 pounds of nails costing $3 per pound to yield a mixture costing $4 per pound?
Answer(s): A
Let x = number of nails costing $7 per pound. The total cost of the mixture equals the sum of the cost for each type of nail or M = A + B, where A = 7x, B = 3(6), and M = 4(6 + x). Substitute the known values into the equation. 4(6 + x) = 7x + 18.24 + 4x = 7x + 1824 – 18 = 7x – 4x3x = 6x = 2
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