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3 years ago

The cost of a gallon of gas recently doubled. By what percent did it increase? A) 50% B) 100% C) 150% D) 200%

1 answer:

5 0

Hey there!

If a cost of a gallon recently doubled, then it increased by 50%. This is because half of 100% is 50% and it takes one more 50% to double.

Hope this helps you.
Have a great day!

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Which function has zeroes at npi/2, where n is an odd integer. Select two of the following that apply.

Andrews [41]

Answer:

$y=cosx$

$y=cotx$

Step-by-step explanation:

The trigonometric function;

$y=\cos(x)$ has zeroes at $\frac{n\pi}{2}$ where $n$ is an odd integer.

The trigonometric function; $y=cot x=\frac{cosx}{sinx}$ . This also has zeroes at $\frac{n\pi}{2}$ where $n$ is an odd integer.

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3 years ago

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Physicians at a clinic gave what they thought were drugs to 860 patients. Although the doctors later learned that the drugs were

Alexus [3.1K]

Answer:

Z=2.36

P=0.0091

Step-by-step explanation:

The hypothesis is:

π > 0.55 which is the population proportion

The formula to get the test statistic is

Zstat = P-π/√π(1-π)/n

P =507.4/860 = 0.59 (sample proportion )

n =860 (sample size)

π =0.55(population porportion)

Zstat = 0.59-0.55/√0.55(1-0.55)/860

Zstat =2.36

From Z table the probability of Z score of 2.36 is 0.9909

To calculate for P- value will then be

P= 1 - 0.9909

P= 0.0091

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3 years ago

The perimeter of a rectangle is 84cm if the width of rectanle is 16 cm Find its lenth.

Gelneren [198K]

To find the perimeter it is 2 X Width + 2 X the length = 84

32+ 2 X the length = 84
2 X the length = 52
Therefore the length is 26cm

4 0

2 years ago

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Which number can each term of the equation be multiplied by to eliminate the decimals before solving?

Sati [7]

Ok...

5.6 = 56/10 = 560/100

1.1 = 11/10 = 110/100

0.12 = 12/100

--------------

$\frac { 560 }{ 100 } j-\frac { 12 }{ 100 } =4+\frac { 110 }{ 100 } j\\ \\ \\ 100\times \left( \frac { 560 }{ 100 } j-\frac { 12 }{ 100 } \right) =\left( 4+\frac { 110 }{ 100 } j \right) \times 100\\ \\ 560j-12=400+110j\\ \\ 560j-110j=400+12\\ \\ 450j=412\\ \\ j=\frac { 412 }{ 450 }$

So, the answer is: 100

You could multiply both sides of the equation by 100 to get the value of (j) quickly.

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3 years ago

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Nookie1986 [14]

Answer:

( $4^{4}$ )^-1

Step-by-step explanation:

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3 years ago

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