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Elenna [48]
2 years ago
14

PLEASE HELP ME WITH THIS!!!!!!!!!!!

Mathematics
1 answer:
torisob [31]2 years ago
3 0

Answer:

7. 76.7

8. 12.6

Step-by-step explanation:

Let me know in the comments if you want me to explain :)

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(Don’t send me a link pls just answer!) First 3 people to answer get lots of points pls do it by friday!
Natali5045456 [20]

Answer:

8835.73ft^3

Step-by-step explanation:

First:

Find area of the base circle.

Diameter is 15, so radius is 7.5

Area of the base circle is 56.25pi (use formula: A=pi(r)^2 ) (also ill convert pi into decimals only later)

next find the volume of the cylinder

height is 40 so volume = 56.25pi*40 = 2250pi

next find the volume of the dome at the top.

you know the radius is 7.5

Use volume of sphere formula below :

4 /3πr^3

=1767.15

alright now add the two bolded values

1767.15+2250pi

= 8835.73

hope this helps

7 0
3 years ago
Read 2 more answers
Solve the following equation for h.<br> r+3Q/h=t
Arada [10]

Answer:

             \bold{h=\dfrac{3Q}{t-r}}

Step-by-step explanation:

\bold{r+\frac{3Q}h=t}\\-r\qquad\ -r\\\bold{\frac{3Q}h=t-r}\\\cdot h\qquad \cdot h\\ \bold{3Q=(t-r)h}\\^{\div(t-r)\quad\div(t-r)}\\\bold{\dfrac{3Q}{t-r}=h}

Or, if you mean (r+3Q)/h=t:

\bold{\frac{r+3Q}h=t}\\{}\ \ \cdot h\quad\ \cdot h\\\bold{r+3Q=ht}\\{}\ \ \div t\qquad \div t\\\bold{\dfrac{r+3Q}{t}=h}\\\\\bold{h=\dfrac{r+3Q}{t}}

4 0
3 years ago
The absolute value of a number is​
DENIUS [597]

Answer:

The absolute value of a number is always positive. So that means you circled the correct one. GOOD JOB!!!!!!!!!!!!!!!!!!!!!!!

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
Please help me I would also like an explanation
Tasya [4]

Answer:

k = 45*

2k = 90*

Step-by-step explanation:

K will be the same as the 45* degrees, as it is across from it.

2k is twice k, which is 90*.

45* + 45* + 90* = 180*

Good luck!

4 0
3 years ago
Travis travel 248 miles in 4 hours what is his unit rate of speed in miles per hour
ivanzaharov [21]
248 divided by 4 equals 62 miles per hour.
8 0
3 years ago
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