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Vikki [24]
2 years ago
5

A savings account earns 6% simple interest per year. The principal is $800. What is the balance after 18 months?

Mathematics
1 answer:
Ilia_Sergeevich [38]2 years ago
8 0

Answer:

$872

Step-by-step explanation:

Simple interest = Principle * Rate * Time / 100

= ( 800 * 6 * 18/12 ) / 100

= $ 72

The balance after 18 months = principle + interest

= 800 + 72

= $ 872

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Joseph needs 345 cement blocks to build a wall 40 cm thick. He needs 205 cement blocks to build a wall 25 cm thick. Each block c
IrinaVladis [17]

9514 1404 393

Answer:

  $105

Step-by-step explanation:

The thicker wall takes 345 -205 = 140 more blocks. Each of those costs $0.75, so the added blocks will cost ...

  140 × $0.75 = $105

The thicker wall will cost $105 more.

7 0
3 years ago
The class sizes of elementary school classes in a public school district are normally distributed with an unknown population mea
weqwewe [10]

Answer: (17.14,\ 22.86)

Step-by-step explanation:

The confidence interval estimate for the population mean is given by :-

\overline{x}\pm ME, where \overline{x} is the sample mean and ME  is the margin of error.

Given : Sample mean: \overline{x}=20

The margin of error for a 98% confidence interval estimate for the population mean using the Student's t-distribution : ME=2.86

Now, the confidence interval estimate for the population mean will be :-

20\pm2.86=(20-2.86,\ 20+2.86)=(17.14,\ 22.86)

Hence, the 98% confidence interval estimate for the population mean using the Student's t-distribution =  (17.14,\ 22.86)

8 0
3 years ago
Let f(x)=15/(1+4e)^(-0.2x)<br><br> What is the y-intercept of the graph of f(x) ?
sergejj [24]
That means when x=0
e^-0.2x =e^0=1
So f(0)=15/5=3
5 0
3 years ago
Read 2 more answers
What's the rule, and answer n
Alexxandr [17]
X-7 is the rule. n is 21
4 0
3 years ago
A state income tax is 9% of any amount earned over $15,000. What state income tax does a person earning $24,500 pay?
ehidna [41]

Answer:

the answer is C. $2,205

3 0
2 years ago
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