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Fudgin [204]
3 years ago
15

78 % of the class scored a C or above on their test. If there are 35 students in the class, how many scored a C or higher? Write

and solve a proportion for this situation.
Mathematics
2 answers:
konstantin123 [22]3 years ago
5 0

Answer:

27 students

Step-by-step explanation:

\frac{78}{100} =\frac{x}{35} \\

cross multiply and you get 27

ratelena [41]3 years ago
3 0

All this question is trying to ask is to find 78% percent of the total number of student in the class.

So first convert 78 to decimal by dividing it by 100: \frac{78}{100} = 0.78

Next multiply that with the total number of students which is 35.

So, 0.78 * 35 = 27.3

Now I don't think there can be a decimal here. The question must be wrong or the percentage might be incorrect. But, just for sake, we'll round it up so the final answer would be: 27

The proportion would be: 273:10

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Three coworkers buy a baby shower gift for $60. The local tax rate is 6%. How much was the tax?
Zanzabum
$3.60 so the gift was $63.60
8 0
3 years ago
Luis used compensation to find 6,572-239 compensation methods u
saveliy_v [14]

Here is the solution...

Compensation

The compensation is nothing but the process of reforming the given expression to find the answer mentally.

Here we need to rewrite the given expression in order find the answer mentally.

<u>Step 1:</u>

Here we can add 8 with 6572, so we get 6580.

<u>Step 2: </u>

Add 8 from 239, so we get 247.

<u>Step 3:</u>

We can rewrite 247 as 240 + 7

<u>Step 4:</u>

Now we can subtract 240 from 6580, so we get 6340.

We can calculate this mentally.

<u>Step 5:</u>

Finally, we can subtract 7 from 6340 mentally, So we get

6333.


Mathematically, the above expression written as

6572- 239

= 6572 + 8 - (239 + 8)

= 6580 - 247

= 6580 - (240 + 7)

= 6580 -240  - 7

= 6340 - 7

= 6333



3 0
3 years ago
HELP ASAP 100 points plzzzzzzzzzzzzzz
Stells [14]

Answer:

1/9

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
The time it takes a customer service complaint to be settled at a small department store is normally distributed with a mean of
noname [10]

Answer:

0.0475 = 4.75% probability that a randomly selected complaint takes more than 15 minutes to be settled.

Step-by-step explanation:

Normal Probability Distribution

Problems of normal distributions can be solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the z-score of a measure X is given by:

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

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the p-value, we get the probability that the value of the measure is greater than X.

Mean of 10 minutes and a standard deviation of 3 minutes

This means that \mu = 10, \sigma = 3

Find the probability that a randomly selected complaint takes more than 15 minutes to be settled.

This is 1 subtracted by the p-value of Z when X = 15, so:

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

Z = \frac{15 - 10}{3}

Z = 1.67

Z = 1.67 has a p-value of 0.9525.

1 - 0.9525 = 0.0475.

0.0475 = 4.75% probability that a randomly selected complaint takes more than 15 minutes to be settled.

5 0
3 years ago
705.6 is what percent of 672
Drupady [299]
105 percent neenendnenenendndnd
3 0
3 years ago
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