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luda_lava [24]
2 years ago
15

Laura’s brownie recipe makes 24 brownies , but this time she wants to double the recipe so that she will have 48 brownies. Her o

riginal recipe calls for 2 1/4 cups of chocolate chips. If she has 2 cup of chocolate at home how much more does she need?
Mathematics
2 answers:
Elza [17]2 years ago
7 0

Answer:

Laura will need 1/4 cups more chocolate

Step-by-step explanation:

If laura has 2 cups of chocolate to begin with and she needs 2 and 1/4 cups when you subtract you get your answer of 1/4.

Hope this Helps have an awesome day!

DaniilM [7]2 years ago
3 0

Answer:

2 1/2 cups

Step-by-step explanation:

2 1/4 doubled is 4 1/2.

(2*2= 4.      1/4*2=1/2)

recipe calls for 2 1/4 cups

doubled it calls for 4 1/2 cups

she has 2 cups

4 1/2- 2= 2 1/2 cups

she needs 2 1/2 cups

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Step-by-step explanation:

You are going to roll two dice.

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Trucks in a delivery fleet travel a mean of 120 miles per day with a standard deviation of 18 miles per day. The mileage per day
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The probability that a truck drives between 150 and 156 miles in a day is 0.0247. Using the standard normal distribution table, the required probability is calculated.

<h3>How to calculate the probability distribution?</h3>

The formula for calculating the probability distribution for a random variable X, Z-score is calculated. I.e.,

Z = (X - μ)/σ

Where X - random variable; μ - mean; σ - standard deviation;

Then the probability is calculated by P(Z < x), using the values from the distribution table.

<h3>Calculation:</h3>

The given data has the mean μ = 120 and the standard deviation σ = 18

Z- score for X =150:

Z = (150 - 120)/18

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Z - score for X = 156:

Z = (156 - 120)/18

  = 2

So, the probability distribution over these scores is

P(150 < X < 156) = P(1.67 < Z < 2)

⇒ P(Z < 2) - P(Z < 1.67)

From the standard distribution table,

P(Z < 2) = 0.97725 and P(Z < 1.67) = 0.95254

On substituting,

P(150 < X < 156) = 0.97725 - 0.95254 = 0.02471

Rounding off to four decimal places,

P(150 < X < 156) = 0.0247

Thus, the required probability is 0.0247.

Learn more about standard normal distribution here:

brainly.com/question/26822684

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