The answer is B. some of the sample data are missing.

This is because out of the 100 students originally sampled by the government agency, only 88 results were taken.

Additionally, we cannot fully take A. as the answer because a non-response error happens when sampling units are not interviewed maybe because they were unavailable or unwilling. So B. is the safer answer.

7 0

2 years ago

The following are the temperatures in °C for the first 10 days in January:

Lady bird [3.3K]

Answer:

15.4 is the range.

Step-by-step explanation:

8 0

1 year ago

A scientist enlarged a circular portion of a microscope slide to make it easier to count the number of bacteria present in the s

Tema [17]

Answer:

Option B. $212.1\ cm^{2}$

Step-by-step explanation:

step 1

Find the central angle of the shaded sector

Remember that the diameter divide the circle into two equal parts ( 180 degrees each part)

Let

x -----> the measure of the central angle of the shaded sector

∠x+72°=180°

∠x=180°-72°=108°

step 2

Find the area of the circle

The area of the circle is

$A=\pi r^{2}$

we have

$r=15\ cm$

assume

$\pi=3.1416$

substitute

$A=(3.1416)(15)^{2}$

$A=706.86\ cm^{2}$

step 3

Find the area of the shaded sector

Remember that the area of the complete circle subtends a central angle of 360 degrees

by proportion find the area of a sector by a central angle of 108 degrees

$\frac{706.86}{360}=\frac{x}{108}\\ \\x=706.86*108/360\\ \\x=212.1\ cm^{2}$

8 0

2 years ago

At a grocery store, blueberries come packaged in 8-ounce containers for $2.80. At a farmers market, blueberries cost $4.20 for14

Minchanka [31]

Grocery store : 2.80/8 = 0.35.....so its 35 cents per oz.----0.35(16) = 5.60 per lb
farmers market : 4.20/14 = 0.3...so its 30 cents per oz --- 0.30(16) = 4.80 per lb

5.60 - 4.80 = 0.80.....answer is : blueberries are 80 cents per pound less expensive at the farmers market

4 0

2 years ago

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