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3 years ago

The formula d = rt means that the distance traveled is equal to the rate (speed) times the time. Solve d = rt for r

Mathematics

2 answers:

Drupady [299]3 years ago

5 0

Answer:

r - d/t

Step-by-step explanation:

Given d = r*t, solve for r:

To isolate r on the right side of this equation, divide both sides by t. This results in

r = d/t

beks73 [17]3 years ago

4 0

Answer:

$r=\frac{d}{t}$

Step-by-step explanation:

We have been given a formula $d=rt$ , which means that the distance traveled is equal to the rate (speed) times the time.

To solve the given equation for r, we will divide both sides of our equation by 't' as shown below:

$\frac{d}{t}=\frac{rt}{t}$

$\frac{d}{t}=r$

Switch sides:

$r=\frac{d}{t}$

Therefore, our required equation would be $r=\frac{d}{t}$ .

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The population of lengths of aluminum-coated steel sheets is normally distributed with a mean of 30.05 inches and a standard dev

Vladimir [108]

Answer:

Probability that the average length of a sheet is between 30.25 and 30.35 inches long is 0.0214 .

Step-by-step explanation:

We are given that the population of lengths of aluminum-coated steel sheets is normally distributed with a mean of 30.05 inches and a standard deviation of 0.2 inches.

Also, a sample of four metal sheets is randomly selected from a batch.

Let X bar = Average length of a sheet

The z score probability distribution for average length is given by;

Z = $\frac{Xbar-\mu}{\frac{\sigma}{\sqrt{n} } }$ ~ N(0,1)

where, $\mu$ = population mean = 30.05 inches

$\sigma$ = standard deviation = 0.2 inches

n = sample of sheets = 4

So, Probability that average length of a sheet is between 30.25 and 30.35 inches long is given by = P(30.25 inches < X bar < 30.35 inches)

P(30.25 inches < X bar < 30.35 inches) = P(X bar < 30.35) - P(X bar <= 30.25)

P(X bar < 30.35) = P( $\frac{Xbar-\mu}{\frac{\sigma}{\sqrt{n} } }$ < $\frac{30.35-30.05}{\frac{0.2}{\sqrt{4} } }$ ) = P(Z < 3) = 0.99865

P(X bar <= 30.25) = P( $\frac{Xbar-\mu}{\frac{\sigma}{\sqrt{n} } }$ <= $\frac{30.25-30.05}{\frac{0.2}{\sqrt{4} } }$ ) = P(Z <= 2) = 0.97725

Therefore, P(30.25 inches < X bar < 30.35 inches) = 0.99865 - 0.97725

= 0.0214

7 0

2 years ago

A store sold 200 cell phone covers in April. The circle graph shows the

Brilliant_brown [7]

Answer:

Step-by-step explanation:

Given

Total is 200

From the attachment, we have:

Required

Black- 35%

Blue-23%

How many more of black than blue were sold

First, calculate the difference in percentage sold

Multiply by the total phones sold;

Hence, 24 more blacks were sold than blue

Hope this helps

Brainliest appreciated :)

6 0

2 years ago

Read 2 more answers

What’s 1 + 1?<br> A. 0<br> B. 0<br> C. 0<br> D. 2

SCORPION-xisa [38]

Answer:

its D

Step-by-step explanation:

$1 + 1 = 2 \\$

8 0

2 years ago

Please help me! Will give points and mark brainliest answer. I have been stuck on this for a while too. Will give 30 points.

garri49 [273]

Answers:

1A. You see, every amount of T shirts costs 5.5 times more than it's amount. So if "n" is the number of shirts and "C" is what it costs, then the equation must be C=5.5n.

1B. Idon't know how to graph it here sorry.

1C. You have to look back to the equation. It has our coefficient (5.5n) on one side and C on the other,so the answer is just 5.5n. Now the questions says 120 shirts so (120)5.5 equals 660.

1D. I just did

7 0

3 years ago

How can "12 of 40" be written as a simplified ratio?

vitfil [10]

<h3>✽ - - - - - - - - - - - - - - - ~<u>Hello There</u>!~ - - - - - - - - - - - - - - - ✽</h3>

➷ 12 : 40

==> 3 : 10

➶ Hope This Helps You!

➶ Good Luck (:

➶ Have A Great Day ^-^

↬ ʜᴀɴɴᴀʜ ♡

5 0

2 years ago

Read 2 more answers