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2 years ago

PLEASE HELP!

Mathematics

2 answers:

zysi [14]2 years ago

5 0

Answer: 77 inches.

Step-by-step explanation:

You know that this map uses this scale:

$1in=3mi$

This means that 1 inch in the map represents 3 miles.

In this case, you know that the actual distance between City A and City B is 231 miles, then, to find the distance between the cities on the map, you can set up de following proportion:

$\frac{1in}{3mi}=\frac{x}{231mi}$

Now, you need to solve for "x":

$(231mi)(\frac{1in}{3mi})=x\\\\x=77in$

Kay [80]2 years ago

4 0

Answer:

77 inches

Step-by-step explanation:

Given

1 inch = 3 miles in map

We are also given the actual distance between City A and City B = 231 miles.

In order to get the distance in inches = Distance between City A and City B in miles/ 3

We are dividing the distance by 3 to get the distance in inches.

So,

Distance on map = 231/3

= 77 inches

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A heap of rubbish in the shape of a cube is being compacted into a smaller cube. Given that the volume decreases at a rate of 3

inna [77]

Answer:

-1/4 meter per minute

Step-by-step explanation:

Since, the volume of a cube,

$V=r^3$

Where, r is the edge of the cube,

Differentiating with respect to t ( time )

$\frac{dV}{dt}=3r^2\frac{dr}{dt}$

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By substituting the values,

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2 years ago

The area of Kamila’s rectangular living room is 2.5 times the area of her square bedroom. The length of the living room is 18 fe

Archy [21]

Let L be the length of one side of Kamila's bedroom (since her bedroom is square, the area would be L x L). Then the width of her living room is 1.25L. So:
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2 years ago

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Answer:

Step-by-step explanation:

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Jason inherited a piece of land from his great-uncle. Owners in the area claim that there is a 45% chance that the land has oil.

bazaltina [42]

<span>45% -------------------------------chance that the land has oil

then
55</span>%--------------------------------chance that the land not have oil

<span>80% -------------------accuracy rate of indicating oil in the soil. (if land does have oil)
20</span>% -------------------accuracy rate of indicating not oil in the soil. (if land does have oil)

20% ---------------------accuracy rate of indicating oil in the soil. (if land has not oil)
80% ---------------------accuracy rate of indicating not oil in the soil. (if land has not oil)

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Oduvanchick [21]

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