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4 years ago

Need help asap!!!!!!!

Mathematics

2 answers:

bija089 [108]4 years ago

6 0

Answer:

Mutiplication

Step-by-step explanation:

In a calculation, you always have to do the multiplication before.

kherson [118]4 years ago

3 0

Answer:

Multiplication

Step-by-step explanation:

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A scuba diver at a depth of -12ft(12 ft below sea level),dives down to a coral reef that is 3.5 times the divers original depth.

svet-max [94.6K]

-42ft below sea level

3 0

4 years ago

352,345,338,... Find the 43rd term

Airida [17]

Step-by-step explanation:

it seems we are dealing with subtraction, as the differences between the 1st and second, and between the 2nd and 3rd numbers are equal : -7

so, we can assume that the sequence is created by always subtracting 7.

a1 = 352

a2 = a1 - 7 = 352 - 7 = 345

a3 = a2 - 7 = a1 - 7 - 7 = 352 - 7 - 7 = 338

an = an-1 - 7 = a1 - 7(n-1) = 352 - 7(n-1)

a43 = 352 - 7(43-1) = 352 - 7×42 = 352 - 294 = 58

5 0

3 years ago

Let w represent Henry's weight in pounds. Eric weighs 12 pounds less then Henry. Write an algebraic expression that represents E

kolezko [41]

Answer:

Step-by-step explanation:

w = Henry's weight

e = Eric's weight

e = w - 12

7 0

3 years ago

Does anyone know the correct answer?

Archy [21]

Answer:

B 12 pi m^2

Step-by-step explanation:

The area of the circle is pi r^2

We know the radius is 6

A = pi (6)^2 = 36 pi

The sector is 120 degrees. The entire circle is 360 degrees.

The fraction is 120/360 = 1/3

The sector covers 1/3 of the circle so it is 1/3 of the area

1/3 A = 1/3 (36 pi) = 12 pi

5 0

3 years ago

Read 2 more answers

The Greater Pittsburgh Area Chamber of Commerce wants to estimate the mean time workers who are employed in the downtown area sp

Valentin [98]

Answer:

98% Confidence interval: (31.74,38.4)

Step-by-step explanation:

We are given the following data set:

29, 38, 38, 33, 38, 21, 45, 34, 40, 37, 37, 42, 30, 29, 35

Formula:

$\text{Standard Deviation} = \sqrt{\displaystyle\frac{\sum (x_i -\bar{x})^2}{n-1}}$

where $x_i$ are data points, $\bar{x}$ is the mean and n is the number of observations.

$Mean = \displaystyle\frac{\text{Sum of all observations}}{\text{Total number of observation}}$

$Mean =\displaystyle\frac{526}{15} = 35.07$

Sum of squares of differences = 506.93

$S.D = \sqrt{\displaystyle\frac{506.93}{14}} = 6.02$

98% Confidence interval:

$\bar{x} \pm t_{critical}\displaystyle\frac{s}{\sqrt{n}}$

Putting the values, we get,

$t_{critical}\text{ at degree of freedom 14 and}~\alpha_{0.02} = \pm 2.145$

$35.07 \pm 2.145(\frac{6.02}{\sqrt{15}} ) = 35.07 \pm 3.33 = (31.74,38.4)$

Thus, there is 98% confidence that the population mean number of minutes spent traveling by workers is between 31.74 mins and 38.40

4 0

3 years ago