All categories

3 years ago

9. Sarah saves $200 in her bank account for 3 years at a 5% interest rate. How much interest does she earn?

Mathematics

2 answers:

Verizon [17]3 years ago

6 0

Answer:

$30

Step-by-step explanation:

Assuming this is an annual compound with a simple interest rate. the formula we can use is A=P(rt).

P=200

r=0.05

t=3

0.05*3=0.15

200*0.15=30

She earned $30

love history [14]3 years ago

6 0

Answer:

The amount of interest she earns is: $30

Step-by-step explanation:

Given

Principle P = $200

Time period t = 3 years

Interest rate r = 5% or 5/100 = 0.05

To determine

Interst I = ?

Using the equation to determine the interest amount

$I = Prt$

substitute P = 200, r = 0.05 and r = 3

$I\:=\:200\:\times \:0.05\:\times \:3$

$I = 30$ $

Therefore, the amount of interest she earns is: $30

You might be interested in

Van and Polina have each drawn a conclusion about multiplying negative fractions.

Leto [7]

Ivan only, because an odd number of negatives does not always make negatives while an even number does.

7 0

3 years ago

Read 2 more answers

the cost of admission to a history museum is 3.25 per person over the age of 3 kids 3 and under get in for free if the total coa

hodyreva [135]

6 ... I may be wrong tho

5 0

3 years ago

A researcher examines 27 water samples for iron concentration. The mean iron concentration for the sample data is 0.802 cc/cubic

Delvig [45]

Answer:

90% confidence interval for the population mean iron concentration is [0.771 , 0.832].

Step-by-step explanation:

We are given that a researcher examines 27 water samples for iron concentration. The mean iron concentration for the sample data is 0.802 cc/cubic meter with a standard deviation of 0.093.

Firstly, the pivotal quantity for 90% confidence interval for the population mean iron concentration is given by;

P.Q. = $\frac{\bar X - \mu}{\frac{s}{\sqrt{n} } }$ ~ $t_n_-_1$

where, $\bar X$ = sample mean iron concentration = 0.802 cc/cubic meter

s = sample standard deviation = 0.093

n = number of water samples = 27

$\mu$ = population mean

Here for constructing 90% confidence interval we have used t statistics because we don't know about population standard deviation.

So, 90% confidence interval for the population mean, $\mu$ is ;

P(-1.706 < $t_2_6$ < 1.706) = 0.90 {As the critical value of t at 26 degree of

freedom are -1.706 & 1.706 with P = 5%}

P(-1.706 < $\frac{\bar X - \mu}{\frac{s}{\sqrt{n} } }$ < 1.706) = 0.90

P( $-1.706 \times {\frac{s}{\sqrt{n} } }$ < ${\bar X - \mu}$ < $1.706 \times {\frac{s}{\sqrt{n} } }$ ) = 0.90

P( $\bar X -1.706 \times {\frac{s}{\sqrt{n} }$ < $\mu$ < $\bar X +1.706 \times {\frac{s}{\sqrt{n} }$ ) = 0.90

90% confidence interval for $\mu$ = [ $\bar X -1.706 \times {\frac{s}{\sqrt{n} }$ , $\bar X +1.706 \times {\frac{s}{\sqrt{n} }$ ]

= [ $0.802 -1.706 \times {\frac{0.093}{\sqrt{27} }$ , $0.802 +1.706 \times {\frac{0.093}{\sqrt{27} }$ ]

= [0.771 , 0.832]

Therefore, 90% confidence interval for the population mean iron concentration is [0.771 , 0.832].

4 0

3 years ago

{(1,3), (2, 5), (3,-4), (4, -3), (5, -1)} The above is DONE Function or not a Function?

Hoochie [10]

Answer:

Yes it is a Function

Step-by-step explanation:

Because there are no same x-values with the same y-values

3 0

3 years ago

PLS help 10 points & will give brainliest PLEASE bruh

LekaFEV [45]

Answer:

I hope it is correct ✌️

7 0

3 years ago

9. Sarah saves $200 in her bank account for 3 years at a 5% interest rate. How much interest does she earn?​

9. Sarah saves $200 in her bank account for 3 years at a 5% interest rate. How much interest does she earn?