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3 years ago

15

The domestic postage rate for first-class letters weighing 12 oz or less is $0.37 for the first ounce and $0.23 for each additio

nal ounce or part of an ounce. How much will it cost to send a letter that weighs 7.5 oz?

1 answer:

tatyana61 [14]3 years ago

5 0

The letter will cost $1.98.

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Zinaida [17]

Answer:

y=-0.215x^2+35

Step by Step:

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We know that, the general equation of the parabola.

$y-k = a(x-h)^2$

$\Rightarrow y=a(x-h)^2+k .........(i)$

Substitute the value of $h, k, x, y$ in equation $(i)$ and find the value of $a.$

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2 years ago