Annie estimates that the height of a bookcase is 78.25 in. The actual height is 75.50 in.

A salesman sells between 15 and 25 cars per month. What is the best estimate of the number of cars he will sell in a year

aivan3 [116]

Answer:

he will sell the minimum of 180 cars or the maximum of 300

Step-by-step explanation:

6 0

3 years ago

We have the survey data on the body mass index ( BMI) of 664 young women. The mean BMI in the sample was . We treated these data

dmitriy555 [2]

Step-by-step explanation:

Margin of error = critical value × standard error

The standard error is:

s = σ / √n

s = 7.4 / √664

s = 0.287

The population is normally distributed, so the critical value can be found from a z-score table.

For 90% confidence, z = 1.645.

For 95% confidence, z = 1.960.

For 99% confidence, z = 2.576.

The margins of error are:

90%: 1.645 × 0.287 = 0.4724

95%: 1.960 × 0.287 = 0.5629

99%: 2.576 × 0.287 = 0.7398

The mean is 26.6, so the confidence intervals are:

90%: (26.6 − 0.47, 26.6 + 0.47) = (26.13, 27.07)

95%: (26.6 − 0.56, 26.6 + 0.56) = (26.04, 27.16)

99%: (26.6 − 0.74, 26.6 + 0.74) = (25.86, 27.34)

4 0

4 years ago

Can someone PLEASE help!!!! If you get it right I will mark Brainly!

Oksana_A [137]

Answer:

C. 3 g/cm³

Step-by-step explanation:

.

→ Find Volume

V = 5 cm × 4 cm × 2 cm

V = 40 cm³

.

→ Find density

$\rm = \frac{massa}{volume}$

$\rm = \frac{120}{40}$

$\red{\boxed{ \rm \bold{= 3g/ {cm}^{2}} }}$

5 0

3 years ago

Find the distance between the points (8,1) and (2,10).<br> Round decimals to the nearest tenth.

miss Akunina [59]

The nearest distance between the points (8,1) and (2,10) is 11 units, which is mentioned in and also calculated by using formula.

Step-by-step explanation:

The given is,

Two points are (8,1) (2,10)

Step: 1

By graphical method, refer the attachment,

First point (8,1)

The values of x=8 and y=1 noted in the graph

Second point (2,10)

The values of x=2 and y=10 noted in the graph

Now join the two points (8,1) and (2,10)

Measure the distance between two points, the distance is 11 units. Due to some error the value becomes 10.98 or 11.1 we need to convert the answer into nearest whole number.

( OR )

Step:1

By formula method,

Distance = $\sqrt{(x_{2} - x_{1} )^{2} +(y_{2} - y_{1} )^{2} }$ .....................(1)

Where,

(8,1) are ( $x_{1},y_{1}$ )

(2,10) are ( $x_{2},y_{2}$ )

From the equation,

= $\sqrt{(2 - 8 )^{2} +(10 - 1 )^{2} }$

= $\sqrt{(-6 )^{2} +(9 )^{2} }$

= $\sqrt{36 +81 }$

= $\sqrt{117}$

= 10.81665

≅ 11 ( Answer convert to the nearest tenth)

Distance = 11 units

Result:

The nearest distance between the points (8,1) and (2,10) is 11 units, which is mentioned in and also calculated by using formula.

5 0

4 years ago

card has three times as many ten dollar bills as 5 dollar bills, she has a total of 350. how many five dollar bills Does she hav

lara31 [8.8K]

She has 10 five dollar bills. Set up the system using x as 5 dollar bills and y as 10 dollar bills:

5x + 10y = 350
3x = y
Substitute in 3x for y in the first equation and solve

4 0

3 years ago

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