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3 years ago

Use Order of Operations. (2/5 x 30) x 6 to the second power - 3 to the second power

Mathematics

1 answer:

SIZIF [17.4K]3 years ago

5 0

Answer:

Step-by-step explanation:

(2/5 * 30) * 6^2 - 3^2 Reduce 2/5 * 30

180 * 6^2 - 3^2 Raise the bases of the power

180 *36 - 9 Multiply 36 and 180

6480 - 9 Subtract 9

6471

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The length of time a full length movie runs from opening to credits is normally distributed with a mean of 1.9 hours and standar

Margarita [4]

Answer:

0.26
0.91
1.43

Step-by-step explanation:

given data

mean = 1.9 hours

standard deviation = 0.3 hours

solution

we get here first random movie between 1.8 and 2.0 hours

so here

P(1.8 < z < 2 )

z = (1.8 - 1.9) ÷ 0.3

z = -0.33

and

z = (2.0 - 1.9) ÷ 0.3

z = 0.33

z = 0.6293

P(-0.333 < z < 0.333 )

= 0.26

so random movie is between 1.8 and 2.0 hours long is 0.26

and

A movie is longer than 2.3 hours.

P(x > 2.3)

P( $\frac{x-\mu }{\sigma}$ > $\frac{2.3-\mu }{\sigma}$ )

P (z > $\frac{2.3-1.9 }{0.3}$ )

P (z > 1.333 )

= 0.091

so chance a movie is longer than 2.3 hours is 0.091

and

length of movie that is shorter than 94% of the movies is

P(x > a ) = 0.94

P(x < a ) = 0.06

P( $\frac{x-\mu }{\sigma }$ < $\frac{a-\mu }{\sigma }$ )

$\frac{a-1.9 }{0.3 } = -1.55$

a = 1.43

so length of the movie that is shorter than 94% of the movies about 1.4 hours.

3 0

3 years ago

is hanging birdhouses on her fence, which includes one red post. The first birdhouse is 27.7 in. to the right of the red post.

Mariana [72]

it is 30.8 hopes this helps

4 0

3 years ago

Read 2 more answers

A bus on a regular schedule takes 3 1/4 hours to reach its destination. The express bus takes 2 1/2 hours to make the same trip.

RSB [31]

Time taken by a regular bus to reach its destination = 3 1/4 hours
   = 13/4 hours
Time taken by the express bus to make the same trip = 2 1/2 hours
   = 5/2 hours
Time that can be saved by taking the express bus = (13/4) - (5/2) hours
   = (13 - 10)/4 hours
   = 3/4 hours
So 3/4 hours can be saved by taking the express bus rather than the regular bus. The correct option among all the options given in the question is option "C". I hope the procedure is simple enough for you to understand.

7 0

3 years ago

Read 2 more answers

A rectangle has an area of 2x2 - 19x +45 ft? What are the dimensions of the rectangle? (hint: factor)

makkiz [27]

I think the answer is (2x - 9)(x - 5)

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3 years ago

Greg needs $51 to go on a field trip. He has saved $12.75. He earns $6.50 per hour cleaning his neighbor's garden, and he earns

Schach [20]

B.)Yes, because the total will be $52

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