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3 years ago

PLEASE HELP! I'm so confused!

Mathematics

1 answer:

Sergeeva-Olga [200]3 years ago

7 0

Ummmm..... 3245.78 per week.

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Data Set 1

goldfiish [28.3K]

Answer:

Data Set 1: 20

Data Set 2: 25

Step-by-step explanation:

Range = maximum value - minimum value

Range of Data Set 1:

Maximum value of data set 1 = 40

Minimum value of data set 1 = 20

Range of Data Set 1 = 40 - 20 = 20

Range of Data Set 2:

Maximum value of data set 2 = 60

Minimum value of data set 2 = 35

Range of Data Set 2 = 60 - 35 = 25

7 0

3 years ago

What expression gives the volume of a sphere with radius 8

Natalija [7]

V=(4/3)(pi)(r^3)
V=(4/3)(pi)(8^3)
V=(4/3)(pi)(512)
V=(2048/3)(pi), or around 2144.660585

7 0

3 years ago

Read 2 more answers

Drag and drop each pair of lines into the correct category to indicate whether the pair of lines are parallel, perpendicular, or

ANTONII [103]

Answer:

Step-by-step explanation:

(1). $\frac{1}{7}$ x + y = 9 and y = - 7x ( Neither ) ; lines intersect.

(2). y = 3x - 3; 12x - 4y = 12 ( Neither ) ; Lines are overlapped or both equation are of the same line.

(3). 7y = 2x + 1; 14x + 4y = 12 ( Perpendicular ) ; $m_{1}$ = $\frac{2}{7}$ and $m_{2}$ = - $\frac{7}{2}$ , slopes are opposite reciprocals.

(4). x - 4y = 18; y = x + 4 ( Neither ) ; lines intersect.

(5). 3x - 4y = - 1; 3y = - 4x + 5 ( Perpendicular ) ; $m_{1}$ = $\frac{3}{4}$ and $m_{2}$ = - $\frac{4}{3}$ , slopes are opposite reciprocals.

7 0

2 years ago

In order to efficiently bid on a contract, a contractor wants to be 95% confident that his error is less than two hours in estim

Sonja [21]

Answer:

Step-by-step explanation:

Given that in order to efficiently bid on a contract, a contractor wants to be 95% confident that his error is less than two hours in estimating the average time it takes to install tile flooring.

Std deviation =4.5 errors

95% confidence interval = Mean±1.96*std dev

Hence we have

$1.96(\frac{4.5}{\sqrt{n} } )$