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KengaRu [80]
3 years ago
9

Estimate 1/4 times 21

Mathematics
1 answer:
olga55 [171]3 years ago
5 0

Answer:

63/4 or 15.75 or 153/4.

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If the legs of an isosceles right triangle have a length of 15√2 ft, the hypotenuse will have a length of _____feet.
Soloha48 [4]

we know that

An isosceles triangle has two equal sides and two equal angles

If the isosceles triangle is a right triangle

then

The measure of the angles are  45\°- 90\°- 45\°

cos (45\°)=\frac{\sqrt{2}}{2}

cos (45\°)=\frac{leg}{hypotenuse}

so

\frac{leg}{hypotenuse}=\frac{\sqrt{2}}{2}

we have

leg=15\sqrt{2}\ ft

Substitute and solve for the hypotenuse

\frac{15\sqrt{2}}{hypotenuse}=\frac{\sqrt{2}}{2}\\ \\hypotenuse=2*15 \\ \\ hypotenuse=30\ ft

therefore

<u>the answer is</u>

30\ feet

6 0
4 years ago
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A CD usually sells for $17.00. If the CD is 30% off, and sales tax is 6%, what is the total price of the CD, including tax?
Ivan
If it is 30% off, then u r paying 70%

70% of 17 = 0.7(17) = 11.90 ...this is without tax

u have a tax rate of 6%.....

11.90 * 1.06 = 12.614 rounds to 12.61 <== total cost including tax
8 0
3 years ago
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17 POINTS!!!<br><br> 0.6x = 2.8<br> show your work
Lisa [10]

Answer:

x=28/6

Step-by-step explanation:

0.6x=2.8

0.6x*10=2.8*10

6x=28

6x/6=28/6

x=28/6

8 0
3 years ago
A cylinder has volume 45 pie and radius 3. What is its height?
liraira [26]

Answer:

5 units

Step-by-step explanation:

The <u>volume of the cylinder</u> is the area of the circle multiplied by it's height. Therefore, the volume of the cylinder is πr² × h, which when simplified, gives us πr²h. Let's substitute the volume and the radius in the formula to find the height.

⇒ πr²h = Volume of cylinder

⇒ (π)(3²)(h) = 45π

Now, simplify the equation to evaluate the area of the cylinder.

⇒ (π)(3²)(h)/(3²)(π) = 45π/(3²)(π)

⇒ (h) = 45π/(9)(π) = 45/(9) = 5 units

7 0
3 years ago
Show work plz
MAXImum [283]
First u need to divide 135 by 0.4 which equals 337.5, So her gross pay is $337.50
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3 years ago
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