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Galina-37 [17]
3 years ago
11

A recipe requires 5 cups of corn starch. You can only measure using 2/5 cups. How many 2/5 cups are needed for this recipe? Leav

e answer as an improper fraction
Mathematics
1 answer:
Readme [11.4K]3 years ago
6 0
<h2>Number of cups of corn starch required for the recipe = 12.5</h2>

Step-by-step explanation:

Total starch required = 5 cups

Measurement of measuring cup = 2/5 cups.

Number of cups required = Total starch required ÷ Measurement of measuring cup

\texttt{Number of cups required = }\frac{5}{\frac{2}{5}}\\\\\texttt{Number of cups required = }\frac{25}{2}\\\\\texttt{Number of cups required = }12.5cups

Number of cups of corn starch required for the recipe = 12.5

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"How much do students pay, on average, for textbooks during the first semester in college? From a random sample of 400 students
dezoksy [38]

Answer: The margin of error = 3.71, confidence interval = (354.04, 361.46) and it means that mean cost is lies within the confidence interval.

Step-by-step explanation:

Since we have given that

Sample size = 400

Mean = $357.75

Standard deviation = $37.89

At 95% confidence level, z = 1.96

We first find the margin of error.

Margin of error is given by

z\times \dfrac{\sigma}{\sqrt{n}}\\\\=1.96\times \dfrac{37.89}{\sqrt{400}}\\\\=3.71

95% confidence interval would be

\bar{x}\pm \text{margin of error}\\\\=357.75\pm 3.71\\\\=(357.75-3.71,357.75+3.71)\\\\=(354.04,361.46)

Hence, the margin of error = 3.71, confidence interval = (354.04, 361.46) and it means that mean cost is lies within the confidence interval.

7 0
3 years ago
A rock sample containing an isotope with a half-life of 28 million years has an initial mass of 184 grams. how much time has ela
damaskus [11]
<h2>Half Life</h2>

The half life period is the time in which only half of the given population remains. It can be represented through this equation:

f(t)=a\times(1/2)^{\frac{t}{h}}

  • <em>t</em> = time passed
  • <em>a</em> = y-intercept
  • <em>h</em> = half life

<h2>Solving the Question</h2>

We're given:

  • <em>h</em> = 28 million years
  • <em>a</em> = 184 grams (this is the initial mass, after 0 time has passed)

For most questions like this, we would have to plug these values into the equation mentioned above. However, this question asks for the time elapsed after 3 half-lives.

This can be calculated simply by multiplying the given half-life by 3:

28 million years x 3

= 84 million years

<h2>Answer</h2>

84 million years

3 0
1 year ago
What is the range of the function y = e Superscript 4 x
Alborosie

Answer:

A. Less than zero

Step-by-step explanation:

So If you graph the function,  you'll see that it never actually crosses the y axis into the third or fourth quadrant, the quadrants where all y values become negative.

The answer A is also correct on Edge

Have a great day dude

3 0
3 years ago
Read 2 more answers
$7230 for 3.25% in 12 years
IceJOKER [234]

$2,819.70 is the answer

You multiply .0325×12×72.30

6 0
3 years ago
Find the coordinates of the missing endpoint if B is the midpoint of AC. C(-6,-2),B(-3,-5)
Margaret [11]

Answer:

  A = (0, -8)

Step-by-step explanation:

  B = (A+C)/2 . . . . the midpoint is the average of the end points

  A = 2B -C = 2(-3, -5) -(-6, -2) . . . solve for A, substitute point values

  A = (0, -8)

5 0
2 years ago
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