All categories

2 years ago

Calvin bought 20 pencils at 0.45 each how many change did he get from a 10 dollar bill

Mathematics

2 answers:

ehidna [41]2 years ago

4 0

To get the answer, multiple 20 by 0.45= $9 than subtract 9$ from $10 which equals $1.

-Dominant- [34]2 years ago

3 0

Answer:

1 dollar

Step-by-step explanation:

This is simple you multiply 20 by how much money

20 x .45 = 9 then we will take how much money you SPENT and minus it from what you gave the cashier

10 - 9 = 1 you got 1 dollar in change

You might be interested in

Mom uses 14.25 pounds of fruit for 16 servings of fruit salad. if each serving contains the same amount of fruit, how much fruit

BabaBlast [244]

14.25 / 16 = 0.891 lbs
0.891 lbs of fruit <span>is in each serving
</span>
hope that helps

5 0

3 years ago

Read 2 more answers

Find the value of x. The angles are in the picture! Please quick I will give Brainliest!

Tcecarenko [31]

Answer:

x = 50

Step-by-step explanation:

The interior angles of a Pentagon adds up to 540.

90 + 125 + 125 + 2x + 2x = 540

340 + 4x = 540

4x = 200

x = 50

7 0

2 years ago

The correlation between a car’s engine size and its fuel economy (in mpg) is r = - 0.774.

fgiga [73]

Answer: 59.91%.

Step-by-step explanation:

We know that the fraction of the variability in data values accounted by a model is given by $r^2$ , where r is the coefficient of correlation.

We are given , that the correlation between a car’s engine size and its fuel economy (in mpg) is r = - 0.774.

Then, the fraction of the variability in fuel economy is accounted for by the engine size would be $r^2=( - 0.774)^2=0.599076\approx59.91\%$

[Multiply 100 to convert a decimal into percent]

Hence, the fraction of the variability in fuel economy is accounted for by the engine size is 59.91%.

None of the options are correct.

5 0

3 years ago

Change 5 into a rational number a/b

kupik [55]

Answer:

$\frac{5}{1}$

Step-by-step explanation:

7 0

2 years ago

If electricity power failures occur according to a Poisson distribution with an average of 3 failures every twenty weeks, calcul

Wittaler [7]

Answer:

0.9898 = 98.98% probability that there will not be more than one failure during a particular week.

Step-by-step explanation:

In a Poisson distribution, the probability that X represents the number of successes of a random variable is given by the following formula:

$P(X = x) = \frac{e^{-\mu}*\mu^{x}}{(x)!}$

In which

x is the number of sucesses

e = 2.71828 is the Euler number

$\mu$ is the mean in the given interval.

3 failures every twenty weeks

This means that for 1 week, $\mu = \frac{3}{20} = 0.15$

Calculate the probability that there will not be more than one failure during a particular week.

Probability of at most one failure, so:

$P(X \leq 1) = P(X = 0) + P(X = 1)$

Then

$P(X = x) = \frac{e^{-\mu}*\mu^{x}}{(x)!}$

$P(X = 0) = \frac{e^{-0.15}*0.15^{0}}{(0)!} = 0.8607$

$P(X = 1) = \frac{e^{-0.15}*0.15^{1}}{(1)!} = 0.1291$

Then

$P(X \leq 1) = P(X = 0) + P(X = 1) = 0.8607 + 0.1291 = 0.9898$

0.9898 = 98.98% probability that there will not be more than one failure during a particular week.

6 0

2 years ago