3 years ago

Please help me with questions 21 and 22

Mathematics

1 answer:

valentina_108 [34]3 years ago

3 0

I’m not sure abt 21 but 22 is the second one and the 4th one. So 2,4.

You might be interested in

Crud I put in the wrong thing

krek1111 [17]

Answer:

368 square feet

Step-by-step explanation:

7 0

3 years ago

What ever link you send me i will open and mark brainlest

nordsb [41]

Answer:

Princess_Anyla/nka8iza0q6lm8dm1

Step-by-step explanation:

7 0

3 years ago

Which of the following is a whole integer and rational number? A) 2.6 B). -79 C.) 5/8 D)46

Mandarinka [93]

Hi! The answer would be D. It is basically just asking for a whole number. 2.6 is a decimal, C is negative and a decimal. Hope this helped!

5 0

3 years ago

Use differentials to estimate the amount of paint needed to apply a coat of paint 0.07 cm thick to a hemispherical dome with dia

Sav [38]

Answer:

10.12 $m^{3}$

Step-by-step explanation:

Given:

0.07 cm thick = 0.007m and it is dr (the change in radius)

As we know that, the volume of a hemispherical dome with diameter 48 m is:

V = $\frac{2}{3}$ π $r^{3}$

Take the derivative of V we have:

$\frac{dV}{dr}$ = 2π $r^{2}$

<=> dV = 2π $r^{2}$ *dr

<=> dV = 2π* $48^{2}$ *0.0007 = 10.12 $m^{3}$

Hope it will find you well.

6 0

3 years ago

Read 2 more answers

This year, a small business had a total revenue of $40,700. If this is 26% less than their total revenue the previous year, what

Virty [35]

26% less than a value is best found by multiplying by (100 - 26)% = 74% = 0.74
So previous year x 0.74 = 40,700
Previous year = 40,700 / 0.74 = $55,000

8 0

2 years ago