Estimate the answer by rounding each fraction to the nearest whole number and then adding. A.20 B. 20 1/2 C. 21 D. 19

How much should you invest at 3% simple interest in order to earn $65 interest in 14 months?

Lostsunrise [7]

Answer:

The investment amount is approximately $63

Step-by-step explanation:

Formula:-

Simple interest I = PNR/100

P - Principle amount

N - Number of years

R - Rate of interest

It is given that,

To find the amount to be invest

we have,

P = ? N 14 months = 7/6 years and R = 3%

P + PNR/100 = 65

P[1 + NR/100] = 65

P[1 + (7*3)/(6*100)] = 65

P[1 +7/200] = 65

P[207/200] = 65

P = (65*200)/207 62.801 ≈ 63

Therefore the investment amount is approximately $63

3 0

3 years ago

Read 2 more answers

Manufacture of a certain component requires three different machining operations. Machining time for each operation has a normal

Sunny_sXe [5.5K]

Answer:

Z = (60 - x + y + z) / √a + b + c

Step-by-step explanation:

Since it is a normal distribution, we must calculate the mean and standard deviation, since we do not have data, what we will do is leave them based on these:

Thus Total Mean time = M1 + M2 + M3

given:

M1 = x

M2 = y

M3 = z

Total Mean Time M = x + y + z

Now to calculate the standard deviation we first calculate the variance.

The total Variance V = V1 + V2 + V3

Given:

V1 = a

V2 = b

V3 = c

V = a + b + c

Thus Standard deviation SD of the complete operation is

SD = √ V

SD = √a + b + c

we need to find the probability that the mean time is less than or equal to 60 minutes, the first thing is to find the value of Z.

Formula of Z is:

Z = (X - M) / SD

In this case X = 60.

On plugging the values we get

Z = (60 - x + y + z) / √a + b + c

refer to the Z table and find the Probability of Z ≤ (60 - x + y + z) / √a + b + c

5 0

4 years ago

What is 10/25 in simplest form? I’m too lazy for this

ladessa [460]

2/5. Divide both numbers by 5 and there you go

4 0

3 years ago

Read 2 more answers

A. 11.1 B. 6.7 C. 13 D. 4.1

nexus9112 [7]

Answer:

Line AE & Line AD have the same in measurement.

3 0

3 years ago

Problem #4 My teacher said that for every student who earned an A on the last

podryga [215]

Answer:

12

Step-by-step explanation:

We can write the following ratio

1:3 (for every student who gets an A 3 gets a b)

We then can write a new ratio

4:x

We can solve this ratio by multiplying the original ratio by 4

4:12

This means that 12 people earned an B

5 0

3 years ago