3 years ago

Hello I would like help on my math homework, thanks!

Mathematics

1 answer:

Greeley [361]3 years ago

3 0

Since angle QST is 45°, RQST is a square.

Therefore, QR = QT = 6.2

P.S. Good job trying to do Trigonometry tho :D

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Which one of the following statements expresses a true proportion?

adoni [48]

Try them step by step

2/3=3/2? No

3/5=12/20? Lets try and see

If we <span>simplify 12/20 what do we do? Well we take 4*3=12 and 4*5=20

Now that we simply the 4 from both the numerator and denominator we get our answer 3/5

Your answer will be B.</span>

3 0

3 years ago

A giant scoop, operated by a crane, is in the shape of a hemisphere of radius 21 inches. The scoop is used to transfer molten st

eduard

Answer:

31.5 in

Step-by-step explanation:

Volume of a hemisphere = (2/3) $\pi$ r³
(where r is the radius)
Volume of a cylinder = $\pi$ r²h
(where r is the radius and h is the height)
radius r = (1/2) diameter

First, find the volume of the scoop using the volume of a hemisphere formula with r = 21:

Volume = (2/3) $\pi$ x 21³ = 6174 $\pi$ in³

Now equate the found volume of the scoop to the equation of the volume of a cylinder with r = 14, and solve for h:

$\pi$ 14²h = 6174 $\pi$

196 $\pi$ h = 6174 $\pi$

Divide both sides by $\pi$ : 196h = 6174

Divide both sides by 196: h = 31.5

Therefore, the height of the molten steel in the storage tank is 31.5 in

3 0

2 years ago

manager needs to buy chairs for his office the price for 1 chair is 79.99 dollars. If the manager buys 2 or more chairs then he

artcher [175]

1 chair is 79.99
40% discount
79.99 ÷ 100 =0.7999
0.7999 × 60 = 47.994
47.994 rounded down is $47.99
79.99-47.99=30.00
he saved $30

3 0

3 years ago

After eating a delicious meal at your favorite restaurant, the bill comes to $74.98. the sales tax rate is 5.5% and you would li

Licemer1 [7]

So according to the problem, the tax should be calculated using the bill.

So 5.5% equals to 0.055.

Then multiply 0.055 and 74.98.

Thus resulting in 4.1239 and when rounded, the answer should be 4.12, C

4 0

3 years ago

Read 2 more answers

Can I get some help on this I have so many assignments to do and I just want to go to sleep

AfilCa [17]

Hi! It’s me from your other post! Here’s my work for you! It’s been awhile since I’ve done this stuff so I’m really sorry if I get you a bad grade! I just wanted to help out:))

7 0

3 years ago