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Margaret [11]
3 years ago
11

a recipe asks that the following three ingredients be mixed together as follows: add 1/2 of a cup of flour for every 1/2 of a te

aspoon of baking soda and every 1/4 of teaspoon of salt
Mathematics
1 answer:
Harman [31]3 years ago
7 0

Answer:

Step-by-step explanation:

B

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15% of 95? and 3 1/2% of 100?
NISA [10]

Answer:

15% of 95-14.25

3 1/2% of 100-3.5

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
Assume that adults have IQ scores that are normally distributed with a mean of mu equals 105 and a standard deviation sigma equa
Sindrei [870]

Answer:

0.7698

Step-by-step explanation:

If you call your random variable X, then what you are looking for is

P(87 \leq X \leq 123)

because you want the probability of X being <em>between 87 and 123.</em>

We need a table with of the normal distribution. But we can only find the table with \mu = 0 and \sigma = 1. Because of that, first we need to  <em>normalize </em>our random variable:

Z = \frac{X - \mu}{\sigma} = \frac{X - 105}{15}

(you can always normalize your variable following the same formula!)

now we can do something similar to our limits, to get a better expression:

\frac{87 - 105}{15} = \frac{-18}{15} = -1.2

\frac{123 - 105}{15} = \frac{18}{15} = 1.2

And we transform our problem to a simpler one:

P(87 \leq X \leq 123) = P(-1.2 \leq Z \leq 1.2) = P(Z \leq 1.2) - P(Z \leq -1.2)

(see Figure 1)

From our table we can see that P(Z \leq 1.2) = 0.8849 (this is represented in figure 2).

Remember that the whole area below the curve is exactly 1. So we can conclude that  P(Z \geq 1.2) = 0.1151 (because 0.8849 + 0.1151 = 1). We also know the normal distribution is symmetric, then

P(Z \leq -1.2)= P(Z \geq 1.2) = 0.1151.

FINALLY:

P(Z \leq 1.2) - P(Z \leq -1.2) = 0.8849 - 0.1151 = 0.7698

5 0
3 years ago
How long is the unpainted strip of each part of the road
lions [1.4K]
208/16 = 13 yards per part

13-4 = 9 yards of unpainted strip per strip

9*16 = 144 of unpainted strips
7 0
3 years ago
I really need your help, but I don't get any.
STatiana [176]

Answer:

Step-by-step explanation:

x < -12, so x+12 < 0

| x-(-12) | = | x+12 | = -x-12

5 0
3 years ago
5 + 7) + 3 = 5 + (7 + 3)
Liula [17]

Answer:

Step-by-step explanation:

Associative property

3 0
3 years ago
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