Helppppp pls again bro for Brainlyiest be sure to provide proof or nun

Rachel is calculating the interest earned on a deposit of $350 in an account that earns 6% simple interest after 15 years. What

Alla [95]

Answer:

$315

Step-by-step explanation:

You are going to want to use the simple interest formula for this. The one below is modified for solving the interest earned.

$I = Prt$

I = interest amount

P = principal amount

r = interest rate (decimal form)

t = time

Now we can plug in the values into the equation:

$I = 350(.06)(15)$

$I = 315$

This means that Rachel earned $315 worth of interest in the 15 year period.

5 0

3 years ago

A battery was charged. When the charging began, it was 23 percent full. After 30 minutes of charging, the battery was 89 percent

AfilCa [17]

QUESTION:

A battery was charged. When the charging began, it was 23 percent full. After 30 minutes of charging, the battery was 89 percent full. how fast did the battery charge and how long did it take?

Solution :

Given

Initial amount of charge = 23%
Amount after charge = 89%

procedure

Let the rate of charging be r .

r = (change in charge level) / (time interval) = (89% - 23%) / (30 min) = 2.2 % per minute

charge = (rate of charging)(time) + (initial charge)

100% = r*t + 23%

100% = (2.2 %/min)t + 23%

Solve for t and get

t = [(100 - 23) / 2.2]

Answer = 35 min

7 0

4 years ago

-4 2/5 ÷ (-5) my options are -22/25 -8/25 8/25 22/25

yarga [219]

-4 2/5 / -5

-4 2/5 = -22/5
-5 = -5/1

-22/5 / -5/1
Flip -5/1 to multiply
-22/5 x 1/-5
Numerator x numerator / denominator x denominator
-22 x 1 = -22
5 x -5 = -25
-22/-25 = 22/25

The answer is 22/25.

3 0

3 years ago

A psychologist wants to estimate the proportion of people in a population with IQ scores between 80 and 140. The IQ scores of th

ryzh [129]

Using the Empirical Rule, it is found that the proportion of people in a population with IQ scores between 80 and 140 is of 0.95 = 95%.

<h3>What does the Empirical Rule state?</h3>

It states that, for a normally distributed random variable:

Approximately 68% of the measures are within 1 standard deviation of the mean.

Approximately 95% of the measures are within 2 standard deviations of the mean.

Approximately 99.7% of the measures are within 3 standard deviations of the mean.

Considering the mean of 110 and the standard deviation of 15, we have that:

80 = 110 - 2 x 15.

140 = 110 + 2 x 15.

These values are both the most extreme within 2 standard deviations of the mean, hence the proportion of people in a population with IQ scores between 80 and 140 is of 0.95 = 95%.

More can be learned about the Empirical Rule at brainly.com/question/24537145

#SPJ1

7 0

2 years ago

How do you solve the questions Plzzzzz I really need help

bixtya [17]

Answer:

The answers are given in step-by-step explanation

Step-by-step explanation:

In question 4,

Elina walked 12 miles then she walked 0.25 that distance.

We have to find the distance she walked