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Leviafan [203]
3 years ago
14

the probability that a pupil in a class has a calculator is 0.87. what is the probability that the pupil does not have a calcula

tor? in a fraction?
Mathematics
1 answer:
chubhunter [2.5K]3 years ago
8 0

Answer:

13/100

Step-by-step explanation:

we know that

The probability of the event occurring plus the probability of the event not occurring must equal to 1

If the probability that a pupil in a class has a calculator is 0.87

then

The probability that the pupil does not have a calculator is equal to

1-0.87=0.13

Convert to fraction

0.13=\frac{13}{100}

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Answer:

To find m ( slope) we'll use the Slope Formula:

\boxed{\sf{Slope\:(m)}=\cfrac{y_2-y_1}{x_2-x_1}}

<u>Subtract the numbers:-</u>

\sf 7. \:m=\cfrac{4-2}{6-5} =\boxed{2}

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\sf 8.\: m=\cfrac{-1-3}{2-6} =\boxed{1}

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\sf 9.\: m=\cfrac{-4-(-2)}{3-1} =\boxed{-1}

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\sf 10.\: m=\cfrac{0-3}{0-(-3)} =\boxed{-1}

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\sf 11.\:m=\cfrac{4-2}{3-1} =\boxed{1}

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\sf 12.\: m=\cfrac{1-7}{2-5} =\boxed{2}

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\sf 13.\:m=\cfrac{11-9}{1-(-4)} =\boxed{\frac{2}{5}}

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\sf 14.\:m=\cfrac{2-3}{3-5} =\boxed{\frac{1}{2}}

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\sf 15.\: m=\cfrac{11-5}{2-9} =\boxed{-\frac{6}{7}}

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\sf 16.\: m=\cfrac{-7-\left(-6\right)}{8-13}=\boxed{\frac{1}{5}}

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\sf 17.\: m=\cfrac{4-4}{6-1} =\boxed{0}

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\sf 18. \: m=\cfrac{2-(-7)}{5-5}=

↑ Undefined

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6 0
3 years ago
Determine whether each pair of ratios are equivalent. Explain (3/5),(9/15)
Lyrx [107]
Multiple both ratios by a least common denominator 
the least common denominator for both is 15
multiply the first ratio by 3/3
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The answer to this would be $30.67

First of all APR is the wrong term for interest earned on a deposit. So I'm going to guess that you really mean simple interest. Step one figure the amount in the emergency fund. Since the monthly expenses are $1,157.65, you multiply 4 months times $1,157.65: 4($1,157.65) = $4,606.60

Step 2, figure out how much is 25% of $4,606.60. So change the percent in a decimal by moving the decimal to the left two places. So 25.0 becomes .25. Or you could divide 25 by 100 and get .25 Next multiply .25 times $4,606.60 and you get $1,151.65 for the amount in the savings account.

Step 3, subtract the amount in deposited in the savings account from the total amount in the emergency fund. So you $4,606.60 minus $1,151.65 Which gets you $3,454.95 in the CD.

Step 4, Calculate the interest earned in the savings account. Since the savings account earns 3.3% a year and there are 365 days in a non leap year, divide 3.3% by 365 to find out how much interest is earned a day and multiply it times the amount in the savings account. First change 3.3% to a decimal by moving the decimal point to the left two places. Which gets us .033 So .033 divided by 365 times $1,151.65 Which gets us about $0.104 in interest a day. Finally, multiply the interest earned each day by 60 days. $0.104 times 60 Which gets us about $6.25 in interest earned on the savings account for 60 days.

Step 5, Find the interest earned on the CD. Since the CD earns 4.3% interest a year and there are 365 days in a non leap year, divide 4.3% by 365 to find out how much interest is earned a day and multiply it times the amount in the CD. First change 4.3% to a decimal by moving the decimal point to the left two places. Which gets us .043. So .043 divided by 365 times $3,454.95 Which gets us about $0.407 in interest a day. Finally, multiply the interest earned each day by 60 days. $0.407 times 60. Which gets us about $24.42 in interest earned on the CD for 60 days

Step 6, The total interest earned on the savings account and the CD is: $24.42 + 6.25 = $30.67






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