Ask question

Ask question

All categories

3 years ago

8

Lola saved $86.25 in 3 months. She saved $30.75 in the first month and $7.99 in the second month. How much money did Lola save i

n the third month?

1 answer:

pickupchik [31]3 years ago

5 0

The correct answer is 47 dollars and 51 cents.

You might be interested in

1. Sand falling from a chute forms a conical pile whose altitude is always equal to 4/3 the radius of the base. (a) How fast is

solong [7]

Answer:

The volume is increasing at a rate of 16286 in³/min.

Step-by-step explanation:

a) The volume of a cone is given by:

$V = \frac{1}{3}h\pi r^{2}$

Where:

r: is the radius

h: is the height

The rate of change of the volume can be calculated by using the chain rule:

$\frac{dV}{dt} = \frac{\pi}{3}[\frac{dh}{dt}r^{2} + h\frac{d(r^{2})}{dt}]$

Since h = 4/3 r we have:

$\frac{dV}{dt} = \frac{\pi}{3}[\frac{d(\frac{4r}{3})}{dt}r^{2} + \frac{4r}{3}\frac{d(r^{2})}{dt}]$

$\frac{dV}{dt} = \frac{4\pi}{9}[\frac{dr}{dt}r^{2} + r\frac{d(r^{2})}{dt}]$

$\frac{dV}{dt} = \frac{4\pi}{9}[\frac{dr}{dt}r^{2} + 2r^{2}\frac{dr}{dt}]$ (1)

With:

$\frac{dr}{dt}$ = 3 in/min

$r = 3 ft*\frac{12 in}{1 ft} = 36 in$

And by entering the above values into equation (1) we have:

$\frac{dV}{dt} = \frac{4\pi}{9}[(3 in/min)*(36 in)^{2} + 2*(36 in)^{2}*3 in/min]$

$\frac{dV}{dt} = 16286 in^{3}/min$

Therefore, the volume is increasing at a rate of 16286 in³/min.

I hope it helps you!

3 0

3 years ago

140% of what number is 35

nika2105 [10]

Hello :)

140% of 35 is 25 <span>
x = 25</span>

4 0

2 years ago

Read 2 more answers

I need help please with this question!!

Ira Lisetskai [31]

Sorry but where is the question

8 0

2 years ago

Which table of ordered pairs represents a proportinal relationship

jeyben [28]

Answer:

where are the tables lol

7 0

3 years ago

6. There are 90 seats in the school auditorium. The school had a sold out show of their play last weekend, and made $315. The co

Olegator [25]

Answer:

90

Step-by-step explanation:

4 0

3 years ago