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3 years ago

I will give brainiest to whoever answers correctly !!

Mathematics

1 answer:

Lisa [10]3 years ago

4 0

Answer:

The number of units decreased by $8.7\%$ .

Step-by-step explanation:

Initially, 470 units were sold. The following 429 units were sold, meaning this was $470-429=41$ less units than last year. Thus, the number of units sold decreased and the percent of decrease is:

$\frac{41}{470}\approx 8.7\%$

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Geometric mean between 2 and 24

svetoff [14.1K]

Answer:

6.9282

step by step:

=( 2 x 24 )1/2
= ( 48 )0.5
= 6.9282

6 0

3 years ago

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

How do you solve addition equations using models

egoroff_w [7]

Add all the sides up

5 0

3 years ago

Randy buys a pair of shoes that were originally priced at $147. He receives a 35% discount and pays 8.5% sales tax. How much doe

maksim [4K]

Begin by subtracting 35% from 100%, giving 65% which is equivalent to 0.65
Then multiply
147 * 0.67 = 98.49
Now for a sales tax you would want to multiply by 108.5% (or 1.085) as you are paying the previous price and them some
98.49 * 1.085 = <span>106.86165
You can round to the second decimal place since you can't have a monetary value less than a penny
your answer would be $106.86
</span>

3 0

4 years ago

Samaria has 6 more than three times as many pieces of candy as sydney. samaria has 36 pieces of candy. how many does sydney have

lesya [120]

For this case we have:

x: Number of candies that Sydney has

The equation to find the amount of Sydney sweets is given by:

$3x + 6 = 36$