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Over [174]
3 years ago
6

Bob deposits $3000 into an account that pays simple interest at a rate of 5% per year. How much interest will he be paid in the

first 5 years?
Mathematics
1 answer:
Setler [38]3 years ago
4 0

Answer:

He will have paid 750 interest in the first five years.

Step-by-step explanation:

SI = P×R×T/100

3000 x 5 x 5 divided by 100

75000 / 100 = 750

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The radius of a sphere decreases at a rate of 6 m/sec. find the rate at which the surface area decreases when the radius is 20 m
DanielleElmas [232]

The radius of the sphere decreases at the rate of 6 m/ sec

That is, \frac{dr}{dt}=-6

Surface Area of the sphere of radius r is given by S=4\pi r^2

Differentiating with respect to t,

\frac{dS}{dt}=4\pi (2r)\frac{dr}{dt}=8\pi r\frac{dr}{dt}

\frac{dS}{dt}=8\pi (20)^2(-6)=-960\pi \: m^2/sec

8 0
3 years ago
I need help urgent plz someone help me solved this problem! Can someone plz help I’m giving you 10 points! I need help plz help
VMariaS [17]

Answer: a) 8.779 years

               b) 8.664 years

<u>Step-by-step explanation:</u>

a)

A=P\bigg(1+\dfrac{r}{n}\bigg)^{nt}

  • A: accumulated amount (balance)
  • P: principal amount (original/initial investment)
  • r: interest rate (convert to a decimal)
  • n: number of times compounded per year
  • t: number of years

Given: A = 1800, P = 900, r = 8% = 0.08, n = 3, t = unknown

1800=900\bigg(1+\dfrac{0.08}{3}\bigg)^{3t}\\\\\\2=\bigg(1+\dfrac{0.08}{3}\bigg)^{3t}\\\\\\ln\ 2=ln \bigg(1+\dfrac{0.08}{3}\bigg)^{3t}\\\\\\ln\ 2=3t\ ln\bigg(1+\dfrac{0.08}{3}\bigg)\\\\\\\dfrac{ln\ 2}{3\ ln\bigg(1+\dfrac{0.08}{3}\bigg)}=t\\\\\\\large\boxed{8.779=t}

b)  

A=Pe^{rt}

1800=900e^{0.08t}\\\\\\2=e^{0.08t}\\\\\\ln\ 2=0.08t\\\\\\\dfrac{ln\ 2}{0.08}=t\\\\\\\large\boxed{8.664=t}

4 0
2 years ago
A skier needs to buy new ski poles during a ski trip to utah . The price of the poles is $24 and the sales tax is 4.7%. What is
leva [86]
total\ cost=\ price\ of\ poles+sales\ tax\\\\&#10;total\ cost=24+4.7\%*24=24+0.047*24=24+1,128\\\\=25.128\approx25.13\$\\\\&#10;Total\ cost\ is\25 .13\$.
6 0
3 years ago
Please help!!! <br>I will give brainlist thank you!!!​
makkiz [27]

Good evening ,

Answer:

The graph is a line

Step-by-step explanation:

Look at the photo below for the details.

:)

4 0
3 years ago
THe yearly profits of a company is $35,000, but they have been decreasing 6% per year. What will be the profit in 8 years?
Elenna [48]

Answer:

The total money will be $113750(I think)

Just check other's answers.(or use a calculator.)

7 0
3 years ago
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