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ludmilkaskok [199]
3 years ago
8

how many ounces of a 24% alcohol solution and a 29% alcohol solution must be combined to obtain 90 ounces of a 25% solution

Mathematics
1 answer:
atroni [7]3 years ago
8 0

Answer:

agregar 14 o

Step-by-step explanation:

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kolbaska11 [484]

Answer:

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3 0
3 years ago
weekly wages at a certain factory are normally distributed with a mean of $400 and a standard deviation of $50. find the probabi
kenny6666 [7]

Answer:

0.34134

Step-by-step explanation:

In other to solve for this question, we would be using the z score formula

z = (x - μ) / σ

x = raw score

μ = mean

σ = Standard deviation

We are told in the question to find the probability that a worker selected at random makes between $350 and $400

let x1 = 350 and x2= 400 with the mean μ = 400 and standard deviation σ = $50.

z1 = (x1 - μ) / σ = (350-400) / 50 = -1

z2 = (x2 - μ) / σ = (400 - 400) / 50 = (0/50) = 0

From tables, P(z <= -1) = 0.15866

P(z <= 0) = 0.5

Then, the probability would give us, P(-1 ≤ z ≤ 0) =0.5 - 0.15866 =

0.34134

Hence, The probability that a worker selected at random makes between $350 and $400 = 0.34134

7 0
3 years ago
Any cut 2 2/4 feet of balsa wood for the length of a kite he cut 3/4 feet for the width of the kite how much longer is the lengt
stellarik [79]
1 3/4 feet longer than the width.
4 0
3 years ago
Read 2 more answers
Which statements describe the rotations about the origin that could have transformed RSTU to R'S'T'U'? Check all that apply.
Katena32 [7]

clockwise rotation

90° rotation

7 0
3 years ago
Read 2 more answers
The numbers 2-12 are written on cards and placed in the bag.what is the probability of picking an even number then replacing it
weeeeeb [17]

2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12

There are 11 numbers on cards.

6 cards contain even numbers.

Answer: p(even) = 6/11

There is only one card with a 7. After the first card is picked and returned, there are 11 cards in the bag again.

p(even then 7) = p(even) * p(7) = 6/11 * 1/11 = 6/121

Answer: p(even then 7) = 6/121

4 0
3 years ago
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