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3 years ago

At this rate, how many cans make 5 pounds of aluminum?

1 answer:

8 0

Answer: With approximately a half-ounce of aluminum per can, or 32 cans per pound, that makes each one worth about 1.7 cents.

Step-by-step explanation: What is 5 pounds of aluminum cans worth?

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Which expression is equivalent to 15n – 20?

Semenov [28]

The only thing you can do with this expression is to factor a 5 out of the two terms: we have

$15n-20 = 5(3n-4)$

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3 years ago

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Sales at an airport shop has increased by 25 transactions to a total of 400 transactions per day. What is the increased transact

Zielflug [23.3K]

Answer:

6.66

Step-by-step explanation:

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3 years ago

The slope of a line is 5 /7. What is the slope of any line that is perpendicular to that line?

Lady bird [3.3K]

Answer:

-7/5

Step-by-step explanation:

The slope of a perpendicular line is the "negative reciprocal" of the slope of the original line. so just switch the numbers and put the top number into a negative.

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4 years ago

An art history professor assigns letter grades on a test according to the following scheme.A: Top 5% of scoresB: Scores below th

adoni [48]

Answer:

Grade B score:

$76 \leq x \leq 89$

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 73.3

Standard Deviation, σ = 9.7

We are given that the distribution of score on test is a bell shaped distribution that is a normal distribution.

Formula:

$z_{score} = \displaystyle\frac{x-\mu}{\sigma}$

B: Scores below the top 5% and above the bottom 62%

We have to find the value of x such that the probability is 0.62

$P( X > x) = P( z > \displaystyle\frac{x - 73.3}{9.7})=0.62$

$= 1 -P( z \leq \displaystyle\frac{x - 73.3}{9.7})=0.62$

$=P( z \leq \displaystyle\frac{x - 73.3}{9.7})=0.38$

Calculation the value from standard normal z table, we have,

$\displaystyle\frac{x - 73.3}{9.7} = 0.305\\\\x = 76.26$

We have to find the value of x such that the probability is 0.05

$P(X < 0.95) = \\\\P( X < x) = P( z < \displaystyle\frac{x - 73.3}{9.7})=0.95$

Calculation the value from standard normal z table, we have,

$\displaystyle\frac{x - 73.3}{9.7} = 1.645\\\\x = 89.26$

Thus, the numerical value of score to achieve grade B is

$76 \leq x \leq 89$

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3 years ago

At the grocery store, Matthew notices that it costs $2.48 for 40 ounces of jelly. What is the unit price?

kari74 [83]

Answer:

0.06 cents per ounce

Step-by-step explanation:

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3 years ago

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