a cell phone call cost $0.07 per minute for the first 25 minutes and $0.10 per minute for each additional minute how much would
1 answer:
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Answer:
B = 1.875
Step-by-step explanation:
given that A varies directly as B and inversely as C then the equation relating them is
A = ← k is the constant of variation
to find k use the condition A = 12 when B = 3 and C = 2 , then
12 = ( multiply both sides by 2 to clear the fraction )
24 = 3k ( divide both sides by 3 )
8 = k
A = ← equation of variation
when A = 10 and C = 1.5 , then
10 = ( multiply both sides by 1.5 )
15 = 8B ( divide both sides by 8 )
1.875 = B
Answer:
B
Step-by-step explanation:
18 = 2 * 3 * 3 = 2 *3²
Hint: