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3 years ago

please help me on this I'm struggling on this thanks for your helping of you answer.please show your work:-)

Mathematics

2 answers:

Tju [1.3M]3 years ago

7 0

A fraction that represents the same value when both the numerator and the denominator are multiplied by the same number is known as an equivalent fraction.

Part A: 5/20

Equivalent fractions - 5/20,6/24,7/28

Percent :

5/20

Simplify = 1/4

The numerator is the top part of a fraction, and the denominator is the bottom part of a fraction. To convert to decimal divide the numerator and denominator. 

= 1 ÷ 4

Decimal = 0.25

0.25 x 100 = 25%

Part B: 9/20

Equivalent fractions - 18/40,27/60,36/80

Percent:

Fraction = 9/20

The numerator is the top part of a fraction, and the denominator is the bottom part of a fraction. To convert to decimal divide the numerator and denominator.

= 9 ÷ 20

Decimal = 0.45

0.45 x 100 = 45%

Part C: 9/6

Equivalent fractions -12/8,15/10,18/12

Percent: 9/6

Simplify = 3/2

The numerator is the top part of a fraction, and the denominator is the bottom part of a fraction. To convert to decimal divide the numerator and denominator.

= 3 ÷ 2

Decimal = 1.5

1.5 x 100 = 150%

PilotLPTM [1.2K]3 years ago

6 0

A. is 1/4 so that would be 25%
sorry thats all i know

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3 years ago

Step by step explanation please

galina1969 [7]

Two equal triangles

2(1/2×b×h)

=2(1/2×8×10)

$= 80 {cm}^{2}$

Three rectangles

=3(l×h)

=3(18×8)

=3(144)

$432 {cm}^{2}$

Total Surface area

$80 {cm}^{2} + 432 {cm}^{2} \\ 512 {cm}^{2}$

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3 years ago

Monica paid sales tax of $1.20 when she bought a new bike helmet. If the sales tax rate was 6%, how much did the store charge fo

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Answer:

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3 years ago

A machine is designed to fill 16-ounce bottles of shampoo. When the machine is working properly, the amount poured into the bott

Andreyy89

Answer:

(15.8495,16.2505)

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 16.05 ounces

Standard Deviation, σ = 0.2005 ounces

We are given that the distribution of amount poured into the bottles is a bell shaped distribution that is a normal distribution.

Empirical rule:

It states that for a normal distribution, almost all data falls within three standard deviations (denoted by σ) of the mean (denoted by µ).

It shows that 68% falls within the first standard deviation (µ ± σ), 95% within the first two standard deviations (µ ± 2σ), and 99.7% within the first three standard deviations (µ ± 3σ).

Confidence interval:

$\mu \pm 2\frac{\sigma}{\sqrt{n}}$

Putting the values, we get,

$16.05 \pm 2(\frac{0.2005}{\sqrt{4}} ) = 16.05 \pm 0.2005 = (15.8495,16.2505)$

4 0

3 years ago