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3 years ago

HELP ASSAAAAPPP!!!

Mathematics

1 answer:

galina1969 [7]3 years ago

3 0

Answer:

Step-by-step explanation:

Jack drove 278.2 miles on 19.6 gallons of gasoline. then

278.2 miles - 19.6 gallons

x miles - 1 gallon

Write a proportion:

$\dfrac{278.2}{x}=\dfrac{19.6}{1}$

Cross multiply:

$19.6\cdot x=278.2\cdot 1\\ \\19.6x=278.2\\ \\x=\dfrac{278.2}{19/6}\approx 14\ miles$

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Dr,Goode prescribes 0.2 grams of cold medicine for Donald. This medicine comes in tablets that are 0.5 grams or 0.05 grams. Shou

e-lub [12.9K]

Using proportions, it is found that Donald should order 4 of the 0.05 gram tablets.

This question is solved by proportions, using a <em>rule of three</em>.

4 tablets are needed, and they should combine for 0.2 grams. How many grams is there going to be on one tablet?

The <em>rule of three</em> is:

1 tablet - x grams

4 tablets - 0.2 grams

Applying cross multiplication:

$4x = 0.2$

$x = \frac{0.2}{4}$

$x = 0.05$

Donald should order 4 of the 0.05 gram tablets.

For more on proportions, you can check brainly.com/question/24372153

7 0

2 years ago

Will mark as brainliest if correct

Nataly_w [17]

Answer:

X = 2?

Step-by-step explanation:

Have a great day

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3 years ago

A horse began running due east and covered 25 km in 4.0 hr. What is the average

Jobisdone [24]

Answer:

6.25 km an hour

please mark brainliest

Step-by-step explanation:

3 0

3 years ago

Read 2 more answers

How much bigger is 132 than 110 in percentage?

n200080 [17]

Answer:

22%

Step-by-step explanation:

132%-110% is 22%

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2 years ago

A half-filled cylindrical water tank has a water level of 20 feet high. The tank can hold 6000 cubic feet of water. Find the dia

Anettt [7]

Answer:

d = 13.8 feet

Step-by-step explanation:

Because we are talking about cubic feet of water, we need the formula for the VOLUME of a cylinder. That formula is

$V=\pi r^2h$

We will use 3.141592654 for pi; if the tank HALF filled with water is at 20 feet, then the height of the tank is 40 feet, so h = 40; and the volume it can hold in total is 6000 cubic feet. Filling in then gives us:

$6000=(3.141592654)(r^2)(40)$

Simplify on the right to get

$6000=125.6637061r^2$

Divide both sides by 125.6637061 to get that

$r^2=47.74648294$

Taking the square root of both sides gives you

r = 6.90988299

But the diameter is twice the radius, so multiply that r value by 2 to get that the diameter to the nearest tenth of a foot is 13.8

5 0

3 years ago