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4 years ago

11

Samuel pays $20 for a shirt that is on sale. If he saved $5, what is the percent of the discount?

1 answer:

mamaluj [8]4 years ago

7 0

Hi Kyliebreland!
So, If he saved $5 then we do $20 divided by $5 which gives 4 so now we split 100% into 4 pieces which gives us 25%.
Hope this helps!

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Jenna made 10 cookies on blah buster day. She ate one of them her brother 0.2o f the cookies her little sister ate 1/5 of them h

prisoha [69]

Answer:

Jenna has 6 and 4/5 cookies left.

Step-by-step explanation:

Jenna starts with 10 cookies. She eats 1, her brother eats 2, and her little sister eats 1/5. If you add up all the cookies they ate. that would be 3 1/5 cookies they ate. So, 6 and 4/5 cookies are left.

ps. give me brainliest pls

6 0

3 years ago

-14x - 10x + 19x<br> please answer

Anit [1.1K]

the answer is -5x :) I'm pretty sure

8 0

3 years ago

a. Calculate the volume of the solid of revolution created by rotating the curve y = 3 + 3 exp(-5 x) about the x-axis, for x bet

miskamm [114]

Answer:

A) The volume of solid is 18π cubic unit.

B) The volume of sphere is $\dfrac{4}{3}\pi r^3$

a = -r , b = r , $f(x)=\sqrt{r^2-x^2}$ and $V=\dfrac{4}{3}\pi r^3$

Solution A)

The given curve, $y=3+3e^{-5x}$ rotate about x-axis between 2 to 4.

Please find attachment for solid figure or rotation.

Using disk method to find the volume rotation about x-axis

$V=\int_a^b\pi R^2dx$

where, a = 2, b= 4 , $R=y=3+3e^{-5x}$ and dx is thickness of disk.

$V=\int_2^4\pi (3+3e^{-5x})^2dx$

$V=9\pi\int_2^4(1+e^{-10x}+2e^{-5x})dx$

$V=9\pi(x-\dfrac{1}{10}e^{-10x}-\dfrac{2}{5}e^{-5x})|_2^4)$

$V=9\pi(4-\dfrac{1}{10}e^{-40}-\dfrac{2}{5}e^{-20}-2+\dfrac{1}{10}e^{-20}-\dfrac{2}{5}e^{-10}))$

$V=9\pi (2-0)$

$V=18\pi$

Hence, the volume of solid is 18π cubic unit

Solution B)

The equation of circle of radius r and centered at origin (0,0).

$x^2+y^2=r^2$

$y=\sqrt{r^2-x^2}$

The solid form is sphere of radius r.

Using disk method, to find volume of solid

$V=\int_a^b\pi R^2dx$

where, a = -r, b = r , $R=y=\sqrt{r^2-x^2}$ and dx is thickness of disk.

$V=\int_{-r}^r\pi (r^2-x^2)dx$

$V=\pi(r^2x-\dfrac{x^3}{3})|_{-r}^r$

$V=\pi(2r^3-\dfrac{2r^3}{3})$

$V=\dfrac{4}{3}\pi r^3$

Hence, the volume of sphere is $\dfrac{4}{3}\pi r^3$

4 0

4 years ago

A __ is as polynomial with two terms.

Sedbober [7]

Answer:

<u>Bionominal</u>

Step-by-step explanation:

Question:

A ____ is a polynominal with two terms.

Answer:

A <u>Bionominal</u> is a polynominal with two terms.

<u>Bionominal</u> is your answer.

Hope this helps!

5 0

4 years ago

Hi! can i get some help with this question! :)

svetlana [45]

Hi there!

$\large\boxed{log_b3b = 1.8397}$

Keep in mind the following log property:

logₓab = logₓa + logₓb

Thus:

$log_{b}3b = log_{b}3 + log_{b}b\\\\$

We know the value of log_b3, and a log with the same values for the base equals 1. Thus:

$log_b3b = 0.8397 + 1 = 1.8397$

6 0

3 years ago