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2 years ago

Help, please???? This work is hard...

Mathematics

2 answers:

galina1969 [7]2 years ago

6 0

Answer:

$9^{2}$

Step-by-step explanation:any number multiplied by itself usining an exponent is just the original number squared for example

"x" multiplied by "x" using an exponent is $x^{2}$

uranmaximum [27]2 years ago

5 0

Answer:

EASY PEASY

Step-by-step explanation:

9²

HOPE IT HELPS YOU

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Gravel is being dumped from a conveyor belt at a rate of 15 ft3/min, and its coarseness is such that it forms a pile in the shap

gayaneshka [121]

Answer:

0.13 ft/min

Step-by-step explanation:

We are given that

$\frac{dV}{dt}=15ft^3/min$

We have to find the increasing rate of change of height of pile when the pile is 12 ft high.

Let d be the diameter of pile

Height of pile=h

d=h

Radius of pile,r= $\frac{d}{2}=\frac{h}{2}$

Volume of pile= $\frac{1}{3}\pi r^2 h=\frac{1}{12}\pi h^3$

$\frac{dV}{dt}=\frac{1}{4}\pi h^2\frac{dh}{dt}$

h=12 ft

Substitute the values

$15=\frac{1}{4}\pi(12)^2\frac{dh}{dt}$

$\frac{dh}{dt}=\frac{15\times 4}{\pi(12)^2}$

$\frac{dh}{dt}=0.13ft/min$

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4 years ago

Nancy has nine books and she has read 8 total books Sally has two times more books the Nancy how many books does Sally have

ankoles [38]

Sally has eight-teen books.

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4 years ago

Are words even real is anything we as humans taught real in life is it lies please answer with your own thoughts

den301095 [7]

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3 years ago

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Which linear inequality is graphed with y >x-2 to

jek_recluse [69]

Answer:

Step-by-step explanation:

It's D on Edge, hope this helps

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3 years ago

lara31 [8.8K]

Answer:

Step-by-step explanation:

Given the points J (1,-10) and K (7, 2)

From the section formula

$(x,y)=\left(\dfrac{mx_2+nx_1}{m+n}, \dfrac{my_2+ny_1}{m+n}\right)$

The y-coordinates of the point that divides the directed line segment from J to K into a ratio of 5:1 is obtained using the formula:

$y=\dfrac{my_2+ny_1}{m+n}\\m=5, n=1, y_1=-10, y_2=2\\Therefore:\\y=\dfrac{5*2+1*-10}{5+1}\\=\dfrac{10-10}{6}\\=0$

The y-coordinates of the point that divides the directed line segment from J to K into a ratio of 5:1 is 0.

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3 years ago