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3 years ago

A painter can paint 180 square feet in 30 minutes. how many square feet can he paint in 120 minutes?

Mathematics

2 answers:

scoray [572]3 years ago

8 0

Answer:

720

Step-by-step explanation:

jayfeather friend me

sergij07 [2.7K]3 years ago

6 0

Answer:

720

Step-by-step explanation:

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A woman is emptying her aquarium at a steady rate with a small pump. The water pumped to a 12-in.-diameter cylindrical bucket, a

Temka [501]

Answer:

Therefore the rate at which water level is dropping is $\frac{11}{21}$ in per minute.

Step-by-step explanation:

Given that,

The diameter of cylindrical bucket = 12 in.

Depth is increasing at the rate of = 4.0 in per minutes.

i.e $\frac{dh_1}{dt}=4$

$h_1$ is depth of the bucket.

The volume of the bucket is V = $\pi r^2 h$

$=\pi \times 6^2\itimes h_1$

$\therefore V=36\pi h_1$

Differentiating with respect yo t,

$\frac{dV}{dt}=36\pi \frac{dh_1}{dt}$

Putting $\frac{dh_1}{dt}=4$

$\therefore\frac{dV}{dt}=36\pi\times 4$

The rate of volume change of the bucket = The rate of volume change of the aquarium .

Given that,The aquarium measures 24 in × 36 in × 18 in.

When the water pumped out from the aquarium, the depth of the aquarium only changed.

Consider h be height of the aquarium.

The volume of the aquarium is V= ( 24× 36 ×h)

V= 24× 36 ×h

Differentiating with respect to t

$\frac{dV}{dt}=24\times 36 \times \frac{dh}{dt}$

Putting $\frac{dV}{dt}=36\pi\times 4$

$36\pi\times 4= 24\times 36\times \frac{dh}{dt}$

$\Rightarrow \frac{dh}{dt}=\frac{36\pi \times 4}{24\times 36}$

$\Rightarrow \frac{dh}{dt}=\frac{11}{21}$

Therefore the rate at which water level is dropping is $\frac{11}{21}$ in per minute.

7 0

4 years ago

Yuan needs to take a taxi to get to the movies. The taxi charges $3.50 for the first mile, and then $2.50 for each mile after th

NemiM [27]

It takes her 3 1/2 miles to get to the movies

3 0

4 years ago

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How to find three consecutive odd numbers whose product is 2145?

balu736 [363]

Hello :
2145 = 11×13×3×5 ( prime factorisation product)
2145 = 11×13×15
the <span>three consecutive odd numbers whose product is 2145 are : 11 , 13 ,15</span>

7 0

4 years ago

(WILL MARK BRAINLIEST FOR THE FIRST TO ANSWER) The square of a number is equal to two less than three times the number. What are

insens350 [35]

Answer:

Option A

Step-by-step explanation:

Let us take this number as x, translating this description of the equation into mathematical language;

$x^2 = 3x - 2$

Now let us solve for x;

$x^2 = 3x - 2,\\x^2+2=3x-2+2,\\x^2+2=3x,\\x^2+2-3x=3x-3x,\\x^2-3x+2=0,\\\\Factored = \left(x-1\right)\left(x-2\right)=0,\\Zero Factor Principle, \\x = 1, x = 2\\\\Solution - Option A$

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3 years ago

A bottle holds 570 milliliters of liquid. How much is this in ounces? Use the following conversion: 1 ounce is 30 milliliters.

Sveta_85 [38]

570 ÷ 30 = 19 ounces is the answer

7 0

3 years ago

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