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miv72 [106K]
3 years ago
12

Plz get me the correct answer or u will be reported. 15 points for correct answer. Thx.

Mathematics
2 answers:
allochka39001 [22]3 years ago
7 0

Answer:

D

Step-by-step explanation:

correct answer, thanks for 15 pts

Llana [10]3 years ago
6 0

Answer:

Option D is correct

Step-by-step explanation:

Hope it is helpful....

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ChitChat Wireless charges $0.30 per minute plus a monthly base fee. In September, Maggie used 120 minutes and her bill was $51.
SVEN [57.7K]

Answer:

$C = 0.30(m) + 15

C is bill cost

m is number of minutes used

Step-by-step explanation:

In this question, we are asked to write an equation that estimates the bill cost of Maggie’s phone bills.

We proceed as follows;

Now, let’s try and find the base fee.

We can calculate this using her bill for September.

Mathematically;

Bill = (Cost per minute * total minutes) + Base fee

Here, $0.30 per minute for 120 minutes will yield a total of 120 * 0.3 = $36

This means the base fee would be $51-$36 = $15

Now let’s say the bill is $C, and the number of minutes used is m

Mathematically;

$C = 0.30(m) + 15

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3 years ago
1. The mean annual US household income is $72,641. Suppose that the standard deviation is $30,000. a. Find the probability that
valina [46]

Answer:

The answer is below

Step-by-step explanation:

The z score is used to determine by how many standard deviations the raw score is above or below the mean. The z score is given as:

z=\frac{x-\mu}{\sigma}\\\\where\ x=raw\ score,\mu=mean\ and\ \sigma=standard\ deviation \\\\For\ a\ sample\ size\ n: \\\\z=\frac{x-\mu}{\sigma/\sqrt{n} }

Given that μ = $72,641 and σ = $30,000.

a) x > $100000

z=\frac{100000-72641}{30000}=0.91

P(x > 100000) = P(z > 0.91) = 1 - 0.8186 = 0.1814

b) n = 5

x > $100000

z=\frac{100000-72641}{30000/\sqrt{5} }=2.04

P(x > 100000) = P(z > 2.04) = 1 - 0.9793 = 0.0207

c) n = 10

x > $100000

z=\frac{100000-72641}{30000/\sqrt{10} }=2.88

P(x > 100000) = P(z > 2.88) = 1 - 0.9980 = 0.002

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2 years ago
Give four rational numbers equivalent to : a) 2/7 b) 3/5​
serg [7]

Answer:

gg

Step-by-step explanation:

6 0
2 years ago
HELP ASAP OFFERING 13 points
dsp73

Answer:

A

Step-by-step explanation:

4 0
2 years ago
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A ladder is placed 30 inches from a wall. It touches the wall at a height of 50 inches from the ground.
Aneli [31]
Answer : 59.04 is the angle 
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