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2 years ago

Can someone help me!!

Mathematics

1 answer:

bogdanovich [222]2 years ago

6 0

Answer:

$642

Step-by-step explanation:

To calculate sales tax, you multiply the percentage by the price. In this case it would be 600 x 0.07 which is 42. Then you add them together which would be 600 plus 42 which equals 642.

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What is the value of the expression below when simplified? 4[5(3 − 1)]2 − 23

Setler [38]

Simplify the expression.
57
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3 years ago

Read 2 more answers

Professor Halen has 184 students in his college mathematics lecture class. The scores on the midterm exam are normally distribut

AURORKA [14]

Answer: 21

Step-by-step explanation:

Given : The scores on the midterm exam are normally distributed with

$\mu=72.3\\\\\sigma=8.9$

Let X be random variable that represents the score of the students.

z-score: $z=\dfrac{x-\mu}{\sigma}$

For x=82

$z=\dfrac{82-72.3}{8.9}\approx1.09$

For x=90

$z=\dfrac{90-72.3}{8.9}\approx1.99$

Now, the probability of the students in the class receive a score between 82 and 90 ( by using standard normal distribution table ) :-

$P(82$

Now ,the number of students expected to receive a score between 82 and 90 are :-

$184\times0.1146=21.0864\approx21$

Hence, 21 students are expected to receive a score between 82 and 90 .

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3 years ago

The ratio of the surface areas of two spheres is 1:9.

lapo4ka [179]

Answer:

Step-by-step explanation:

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2 years ago

Simplify (-2x)^4 a.) -16x^4 b.) -8x^4 c.) -2x^4 d.) 8x^4 e.) 16x^4

kozerog [31]

answer

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Step-by-step explanation:

(-2x)^4 = -2x^4

which is the same as answer c.)

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2 years ago

If triangle DEF has a 90° angle at vertex E, which statements are true? Check all that apply.

jeka57 [31]

There are two statements that are true: the angle at vertx D is acute and triangle DEF is a right triangle.

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3 years ago