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enot [183]
3 years ago
5

Jessica's grandparents gave her $2000 for college to put in a savings account until she starts college in four years. Her grandp

arents agreed to pay her an additional 7.5% simple interest on the $2000 for every year. How much extra money will her grandparents give her at the end of four years?
Mathematics
1 answer:
Alecsey [184]3 years ago
6 0

Answer:

The correct answer to the following question will be "$600".

Step-by-step explanation:

The given values are:

Principal, P = $2000

Rate of interest, r = 7.5%

After changing percentage into decimal, we get

r = 0.075

Time, t = 4

As we know,

I = P\times r\times t

On putting the given values in the above formula, we get

⇒   = 2000\times 0.075\times 4

⇒   =600

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If the sinA = 3/5 and the cosA = 4/5 , then what is tan A?<br><br> a: 3/4<br> b: 1<br> c: 4/3
AysviL [449]
The answer should be A
4 0
3 years ago
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Help!!!! I need it ASAP!! I am confused. Am I on the right track
melisa1 [442]

Answer:

x = 7

y = 0

Step-by-step explanation:

Close, but not quite.

8 0
3 years ago
During the summer, the population of spring lake is 30,155. During the winter, the population drops down to 13,876. How many peo
aleksley [76]
30,155-13,876=16,279
16,279 people spend on the summer months in spring lake.
3 0
3 years ago
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The Department of Transportation would like to test the hypothesis that the average age of cars on the road is less than 12 year
puteri [66]

Answer:

z=\frac{10.6-12}{\frac{4.1}{\sqrt{45}}}=-2.29  

Step-by-step explanation:

information given

\bar X=10.6 represent the sample mean  

\sigma=4.1 represent the population standard deviation

n=45 sample size  

\mu_o =12 represent the value that we want to test  

\alpha=0.05 represent the significance level for the hypothesis test.  

z would represent the statistic

p_v represent the p value for the test

Hypothesis to test

We want to test if the true mean is less than 12, the system of hypothesis would be:  

Null hypothesis:\mu \geq 10  

Alternative hypothesis:\mu < 10  

The statistic is given by:

z=\frac{\bar X-\mu_o}{\frac{\sigma}{\sqrt{n}}} (1)  

Replacing the info given we got:

We can replace in formula (1) the info given like this:  

z=\frac{10.6-12}{\frac{4.1}{\sqrt{45}}}=-2.29  

8 0
3 years ago
PLEASE HELP ASAP 15 BRAINLY POINTS
lana66690 [7]

Answers

1) 1

2) 11

3) 4

4) D) Yes, the constant of variation is 3

Explanation

Q1

The slope of a line is given by

Slope = (change in y)/(change in x)

= (0 - -2)/(-4 - -6)

= 2/2

= 1

Q2

Slope = Δy/Δx

= (8 - -3)/(2 - 1)

= 11/1

= 11

Q3

Y varies directly as X. This is written as,

Y ∞ X

Put and equal sign then introduce the constant of proportionality, K.

Y = KX

K = Y/X

K = 6/18 = 1/3

∴ Y = (1/3)X

Y = (1/3) × 12

Y = 4

Q4

32Y = 96X

Dividing both sides by 32,

Y = 96/32 X

Y = 3X

3 been the constant, Y varies directly as X.

So, the equation 32y = 96x is a direct variation.

Constant of variation = 3

5 0
3 years ago
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