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3 years ago

What is the mean of the following data set?

Mathematics

1 answer:

elixir [45]3 years ago

8 0

Step-by-step explanation:

You have to add all the numbers equals 160.

Then divide how many numbers there are. There are 20 numbers. Then, it is the sum divided by the count.

Hope this helps. Good Luck!

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What is the slope of the line that contains the points (-3,5)and (-5,6)

tigry1 [53]

(-3,5) (-5,6)
slope = 5-6 / -3 --5
slope = -1 / 2

6 0

3 years ago

If the principal is $300 rate 3% time 4 years then what is the interest earned and the new balance

Tomtit [17]

Answer:

a) Interest earned = $36

New Balance = $336

b) Interest rate = 0.05 or 5%

New Balance = $517.5

c) time t = 5

New Balance = $612.5

d) Principal Amount = $675

New Balance = $783

Step-by-step explanation:

We are given:

a) Principal (P) = $300

Rate (r) = 3% or 0.03

Time (t)= 4 years

Interest earned = ?

The formula used is: $Simple \ Interest (I)= P\times r\times t$

Putting values and finding interest

$Simple \ Interest (I)= P\times r\times t\\Simple \ Interest (I)= 300\times 0.03\times 4\\Simple \ Interest (I)= 36$

So, Interest earned = $36

New Balance = Principal + Interest = 300+36 = $336

b) a) Principal (P) = $300

Rate (r) = ?

Time (t)= 3 years

Interest earned = 67.50

The formula used is: $Simple \ Interest (I)= P\times r\times t$

Putting values and finding rate

$Simple \ Interest (I)= P\times r\times t\\67.50= 450\times r\times 3\\67.50=1350\times r\\r=\frac{67.50}{1350}\\r=0.05 \ or \ 5\%$

So, Interest rate = 0.05 or 5%

New Balance = Principal + Interest = 450+67.50 = $517.5

c) Principal (P) = $500

Rate (r) = 4.5% or 0.045

Time (t)= ?

Interest earned = $112.50

The formula used is: $Simple \ Interest (I)= P\times r\times t$

Putting values and finding time

$Simple \ Interest (I)= P\times r\times t\\112.50= 500\times 0.045\times t\\112.50=22.5 \times t\\t=\frac{112.50}{22.5}\\t=5$

So, time t = 5

New Balance = Principal + Interest = 500+112.50 = $612.5

d) Principal (P) = ?

Rate (r) = 8% or 0.08

Time (t)= 2 years

Interest earned = 108.00

The formula used is: $Simple \ Interest (I)= P\times r\times t$

Putting values and finding Principal

$Simple \ Interest (I)= P\times r\times t\\108=P\times 0.08 \times 2\\108=P\times 0.16\\P=\frac{108}{0.16}\\P=675$

So, Principal Amount = $675

New Balance = Principal + Interest = 675+108 = $783

8 0

2 years ago

Marisella was late to class 4 times in April. Each time she was late she missed 3

Ivenika [448]

Answer:

it's not in the chioces

Step-by-step explanation:

1time =3 mins

4 times =4×3

12mins

7 0

2 years ago

Read 2 more answers

A study was conducted to determine if the salaries of librarians from two neighboring cities were equal. A sample of 15 libraria

kow [346]

Answer:

For the first city, the 95% confidence interval would be:

28,900 +/- 2300 x 3 = 28,900 +/-6900$

For the second city, the 95% confidence interval would be:

30,300 +/- 2100 x 3 = 30,300 +/- 6300$

5 0

3 years ago

An adult pass at the amusement park costs 1.6 times as much as a child's pass.

Ket [755]

Answer:

(5$ = 8) (10$=16) and im still not sure for w then part. b 24$

Step-by-step explanation:

5x1.6=8

10x1.6=16

i need help with w

15x1.6=24

sorry if this didnt help

4 0

3 years ago