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3 years ago

Daniel is reading a 200-page book. He

Mathematics

1 answer:

Minchanka [31]3 years ago

6 0

Set up a ratio to find the number of pages read in 80 minutes:

40 pages/ 50 minutes = x pages/ 80 minutes

Cross multiply:

50x = 3200

Divide both sides by 50:

X = 3200/50

X = 64

He will read 64 pages in 80 minutes.

200 -64 = 136

There will be 136 pages left.

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3 years ago

I need help with this

Kruka [31]

Answer:

Step-by-step explanation:

The formula of a volume of a cylinder:

$V=\pi r^2H$

r - radius

H - height

From the pictue we have r = 5in and H = 3in. Substitute:

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3 years ago

Read 2 more answers

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shepuryov [24]

Factor
b(b+12)=0
set to zero
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b=-12,0

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3 years ago

20 units Humulin R insulin in 100 mL of normal saline (NS) to infuse for 20 hours. (Round to the nearest tenth if applicable) a.

wariber [46]

Answer:

a) 1 unit per hour will be infused.

b) 5mL per hour will be infused.

Step-by-step explanation:

Each question can be solved as a rule of three with direct measures, that means we have a cross multiplication.

a. How many units per hour will be infused?

20 units are going to be infused in 20 hours. How many units are going to be infused each hour?

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20 hours - 20 units

$20x = 20$

$x = \frac{20}{20}$

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b. How many milliliters per hour will be infused?

100mL are going to be infused in 20 hours. How many mL are going to be infused each hour?

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$x = \frac{100}{20}$

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3 years ago

The equation of a circle is (X+12)^2+(y+16)^2=r^2, and the circle passes through the origin. The equation of the circle then cha

serious [3.7K]

Answer:

$x=\sqrt{r_{2} +y-16(r2-y+16)+30}$ R2

$r=\sqrt{x^2+24x+y2+32y+400}$

Step-by-step explanation:

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3 years ago