Determine by what factor the numbers differ. In other words, determine how many times larger the first number is than the second.1.2 × 10-5, 4.8 × 10-15
A. 2.5 × 1010
B. 2.5 × 109
C. 2.5 × 101/3
D. 2.5 × 1020
Answer: B
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Convert the units.27 yards = 
feet
A. 972 B. 243 C. 324 D. 81
Match the given equation with one of the graphs.x2 = 6y
A. 
B. 
C. 
D. 
Use properties of limits to find the indicated limit. It may be necessary to rewrite an expression before limit properties can be applied.
(3x2 - 19)2
A. 100 B. -352 C. 144 D. 256
A young man plans to sell umbrellas at the city's Easter Parade. He knows that he can sell 152 umbrellas at $14 each if it rains hard, he can sell 108 if it rains lightly, and he can sell 41 if it doesn't rain at all. Past records show it rains hard 28% of the time on Easter, rains lightly 69% of the time, and does not rain at all 3% of the time. If he can buy 0, 100, or 200 umbrellas at $5 each and return the unsold ones for $3 each, how many should he buy? ?
A. 200 umbrellas B. 100 umbrellas