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4 years ago

Help please.ASAP.?????????

Mathematics

1 answer:

monitta4 years ago

5 0

Hello! As you may already know, there are 24 hours in a day. To find the amount of hours in a day Becky does something, all you have to do is multiply the amount of hours by the percentage. You can convert the percentages into decimal form to help you out with multiplying, like 40% as 0.4 and 25% as 0.25. If you do this correctly, here are your answers:

School: 6 hours
Eating: 2.4 hours
Sleep: 9.6 hours
Homework: 2.4 hours
Free time: 3.6 hours

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A 38-inch piece of steel is cut into three pieces so that the second piece is twice as long as the first piece, and the third

KengaRu [80]

Let the length of the first piece be x inches. Then:-

x + 2x + 4x + 3 = 38

7x = 38 - 3

x = 35/7 = 5 inches

Answer: the 3 pieces have lengths 5, 10 and 23 inches.

4 0

4 years ago

What is the algebraic expression for f divided by 10

erica [24]

Answer:

f ÷ 10

Step-by-step explanation:

We want to write an expression

divided by means the number or variable before comes first, then the divided by symbol, then what comes after

f ÷ 10

7 0

2 years ago

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Which of the following are roots of the polynomial function F(x)=x^3-6x^2+7x-2

AlladinOne [14]

Answer:

ujjn

Step-by-step explanation:

3 0

3 years ago

Read 2 more answers

Factor z^2-3z-18<br> A.(z+8)(z-10)<br> B.(z+2)(z-9)<br> C.(z+3)(z-6)<br> D.(z-3)(z-6)

konstantin123 [22]

Z^2 - 3z - 18 =
(z + 3)(z - 6)

3 0

3 years ago

1. Main Show Tank Calculation:

natulia [17]

Step-by-step explanation:

Volume of a sphere is

$\frac{4}{3} \pi {r}^{3}$

plug in 70 ft for the radius to get 1,436,755 cubic ft then divide that by 4 since the prompt describes a quarter sphere, giving you a tank volume of 359,189 cubic ft.

Volume of a cylinder is

$\pi {r}^{2} h$

from the second prompt we know the tanks are identical since they are said to be congruent which means the hight and radius are the same. Plug in 120 f for h and 35 ft for r to get the volume of a cylinder and then divide that by 2 to get the volume of a single tank. the volume of both tanks would be

$\pi {35}^{2} (120) = 461,814$

To show tank model is a sixth of the original so you divide the radius by 6 and perform the same calculation as in the first portion of the problem ro get the volume a quarter sphere

$\frac{4}{3} \pi {( \frac{70}{6} )}^{3} = 6,652 \: {ft}^{3}$

To get the percentage of the model relative to the original you divide the models volume by the full scale volume

$\frac{6652}{1436755} \times 100 = 0.46$

which is less than 1% of the full scale volume.

5 0

3 years ago