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3 years ago

15/21 equals 10/e Solve for the missing value Can someone help please ??

Mathematics

1 answer:

Paul [167]3 years ago

7 0

Answer:

e=14

Step-by-step explanation:

15/21 =10/e

by cross multiplying,

e×15=21×10

15e=210

e=210/15

e=14

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3 years ago

The number of mosquitoes M(x), in millions, in a certain area depends on the June rainfall x, in inches: M(x) = 13 x - x2. What

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Answer:

The number of mosquitoes is maximum for 6.5 inches rainfall.

Step-by-step explanation:

The given function is

$M(x)=13x-x^2$ .... (1)

where, M(x) is number of mosquitoes in millions and x the June rainfall in inches.

We need to find the rainfall that produces the maximum number of mosquitoes.

Differential the above function with respect to x.

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Equate first derivative equal to 0.

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$x=\frac{13}{2}=6.5$

Differential function (2) with respect to x.

$M''(x)=-2$

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Therefore, the number of mosquitoes is maximum for 6.5 inches rainfall.

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3 years ago

A company charger shipping fee that is 4.5% of the purchase price for all items it ships. What is the fe to ship an item that co

kenny6666 [7]

Answer:

This is an percentage change question, by any chance you have a maths textbook, look for units that contains the topic: Percentage Change. Now, let's get solving! :)

Step-by-step explanation:

Firstly, you must multiply 4.5% with 56. That is: shipping fees x purchase price

That gives ($) 2.52 (this is your answer)

No addition/totaling needed as the question asked ONLY for the shipping fees.

Stay safe and Merry Christmas! :)

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3 years ago