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2 years ago

12% of 72 is what number?

Mathematics

1 answer:

xxTIMURxx [149]2 years ago

5 0

I hope this helps you ?.12%=72 ?.12=72.100 ?=6.100 ?=600

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Autumn drives 825 miles to Florida. The trip takes her 17 hours. She uses 38 gallons of gas on the trip, which cost her $125. Fi

Dmitry [639]

$speed \: equals \: distance \div time$
speed equals 825 divided by 17
speed equals to 48.5miles per hour

gas mileage equals to 825/38
gas mileage equals to 21.7

125/38 equals to 3.3 unit price

8 0

2 years ago

The original price of a computer game is $45. The price is marked down by $18. What percent of the original price is the markdow

natali 33 [55]

Answer:

60%

Step-by-step explanation:

To know the discount, we must know how much that $ 18 represents of the original price, as follows:

18/45 = 0.4

That is, $ 18 is 40% of $ 45

Therefore, to calculate the discount we must subtract what represents 45%, that is, 100%

100% - 40% = 60%

In other words, the discount is 60%

6 0

2 years ago

Sarah made a necklace using 5 times as many blue beads as white beads. She used a total of 30 beads. How many blue beads did Sar

iogann1982 [59]

Let

x-------> the numbers of blue beads

y-------> the numbers of white beads

we know that

$x+y=30$ --------> equation $1$

$x=5y$ --------> equation $2$

Substitute equation $2$ in equation $1$

$(5y)+y=30\\ 6y=30\\ y=30/6\\ y=5$

Find the value of x

$x+y=30\\ x+5=30\\ x=30-5\\ x=25$

therefore

the answer is

the numbers of blue beads is $25$

7 0

3 years ago

Read 2 more answers

I need help. Please help me, thxs.

inessss [21]

Answer:

50 years.

Step-by-step explanation:

Hope this helps!

7 0

1 year ago

Based on a poll, 867 of 1050 randomly selected adult said that they always wear seat belts. Construct and interpret a 97% confid

Mekhanik [1.2K]

The 97% confidence interval for the proportion of adults is 0.801<P<0.851.

Given that 867 adults are randomly selected from 1050 who always wear seat belts.

A confidence interval refers to the probability that a population parameter will fall between a set of values for a certain proportion of times.

Let's assume n=1050 and x=867

Find the sample proportion by dividing the given proportion with sample size as,

$\begin{aligned}\hat{p}&=\frac{x}{n}\\\hat{p}&=\frac{867}{1050}\\ \hat{p}&=0.826 \end$

Find the α by subtracting the given confidence interval that is 97% from 1 as

α=1-(97÷100)

α=1-0.97

α=0.03

To find the critical value that is $Z_{\frac{\alpha}{2}}$ by dividing alpha with 2,

$\begin{aligned}Z_{\frac{\alpha}{2}}&=Z_{\frac{0.03}{2}}\\ Z_{\frac{\alpha}{2}}&=Z_{0.015}\end$

From this table which is shown in the figure it says that the critical value is

$Z_{crit}=\pm 2.17$

Use this formula to find the confidence interval $P=\hat{p}\pm Z_{Crit}\times \sqrt{\frac{\hat{p}(1-\hat{p})}{n}}$

Substitute the values in the formula,

$\begin{aligned}P&=0.826\pm 2.17\times \sqrt{\frac{0.826(1-0.826)}{1050}}\\ P&=0.826\pm 2.17\times \sqrt{\frac{0.826\times 0.174}{1050}}\\ P&=0.826\pm 2.17\times 0.0116995\\ P&=0.826\pm 0.025\end{aligned}$

Hence, a 97% confidence interval for the proportion of adults who always wear seat belts is 0.801<P<0.851.

Learn more about confidence interval from here brainly.com/question/13929861

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7 0

1 year ago