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2 years ago

13

The function y = 400(0.75)* models the amount in milligrams of pain reliever, y. remaining in a patient's bloodstream x hours af

ter the initial dose. How much pain reliever in milligrams remains after 3 hours? No link please

1 answer:

Schach [20]2 years ago

7 0

Step-by-step explanation:

y = 400 × 0.75

y = 300

300 milligrams = 0.75 hours

x = 3 hours

3(300) = 0.75x

900 = 0.75x

x = 1200

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2 years ago

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3 years ago

Charlie's garage has a rectangular floor space. Its length is 3 times its width. Charlie extends the width of his garage to 6 m,

MAXImum [283]

Answer:

The percentage change is 140%

Step-by-step explanation:

Given

$L= 3W_1$ ---- initial dimension

$W_2 = 6m$ --- new width

$A_2 = 45m^2$ --- new dimension

Required

The percentage increment

The length remains constant because only the width is extended.

The new area is:

$Area =Length * Width$

$A_2=L * W_2$

Make L the subject

$L = \frac{A_2}{ W_2}$

Substitute values for A and W

$L = \frac{45m^2}{6m}$

$L = \frac{45m}{6}$

$L = 7.5m$ --- this is the length of the garden

Calculate the initial width:

$L= 3W_1$

Make W1 the subject

$W_1 = \frac{1}{3} * L$

$W_1 = \frac{1}{3} * 7.5$

$W_1 = 2.5$

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$A_1 = L_1 * W_1$

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Express as percentage

$\%A = 1.4*100\%$

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3 years ago