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Mathematics, 14.09.2019 01:30 quaseabrough1
Abasic cellular phone plan costs $4 per month for 70 calling minutes. additional time costs $0.10 per minute. the formula c= 4+0.10(x-70) gives the monthly cost for this plan, c, for x calling minutes, where x> 70. how many calling minutes are possible for a monthly cost of at least $7 and at most $8?
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Answers: 3
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Use a calculator to verify that σ(x) = 62, σ(x2) = 1034, σ(y) = 644, σ(y2) = 93,438, and σ(x y) = 9,622. compute r. (enter a number. round your answer to three decimal places.) as x increases from 3 to 22 months, does the value of r imply that y should tend to increase or decrease? explain your answer. given our value of r, y should tend to increase as x increases. given our value of r, we can not draw any conclusions for the behavior of y as x increases. given our value of r, y should tend to remain constant as x increases. given our value of r, y should tend to decrease as x increases.
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Abasic cellular phone plan costs $4 per month for 70 calling minutes. additional time costs $0.10 pe...
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