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3 years ago

10

Which of the following is the best estimate for 31% of 9? GIVING 99 Points!

2 answers:

Marina CMI [18]3 years ago

5 0

Hello! So, when you know your fractions and percents, you know that about 33% equals 1/3. 31 is close to 33, so the best estimate for 31% of 9 is 3. When you solve it on a calculator, 9 * 31% (0.31) is 2.79, which rounds off to 3 when rounded to the nearest whole number. The answer is B: 3.

Verizon [17]3 years ago

4 0

Hi!

9 * 31% = 2.79

2.79 is closest to 3, so the best estimate for 31% of 9 is 3! =)

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Solve 4e^2x-3=12 please help

Anestetic [448]

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Step 1:

Here we have -3 in subtraction on the left side, so when we take it to the right we apply opposite operation of subtraction that is addition.

$4*e^{2x} = 12+3$

$4*e^{2x} = 15$

Step 2:

Next we have 4 in multiplication on left side, so dividing right side by 4,

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$e^{2x} = 3.75$

Step 3:

taking log on both sides

$ln ( e^{2x}) = ln(3.75)$

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Step 4:

Dividing right side by 2,

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3 years ago

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Step-by-step explanation:

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3 years ago

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zhuklara [117]

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A bag of marbles has 3 red, 4 blue, and 5 white marbles in it. What is the probability of reaching in and selecting a blue marbl

goblinko [34]

Answer:

$P(B)=\frac{1}{3}$

Step-by-step explanation:

The number of red marbles in the bag is; $n(R)=3$ .

The number of blue marbles in the bag is; $n(B)=4$ .

The number of white marbles in the bag is; $n(W)=5$ .

The total number of marbles in the bag is: $n(S)=3+4+5=12$ .

The probability of selecting a blue marble is $P(B)=\frac{n(B)}{n(S)}$

We substitute the given information to obtain:

$P(B)=\frac{4}{12}$

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2 years ago

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ch4aika [34]

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