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4 years ago

2. Give a real-life situation for the product 4 • (- 2). 20 POINTS PLZ HELP

Mathematics

1 answer:

grandymaker [24]4 years ago

7 0

Answer:

A diver can descend 2 feet every minute. If the diver descends for four minutes, where will the diver be in relation to the surface?

Step-by-step explanation:

If the surface is 0 and the diver descends a total of eight feet, then the diver would be at a position of -8 feet.

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| x- ( - 18) | if x < - 18

aleksandrvk [35]

Answer:

well x-(-18) x+18 but the if part is x<-18 will stay the same

Step-by-step explanation:

6 0

2 years ago

(FOR K-12 STUDENTS) Keith correctly determined the area of this parallelogram by adding the areas of the triangles and rectangle

Gemiola [76]

The area of the parallelogram using area of rectangle and area of two triangles is 84 m²

<h3>How to find area of a parallelogram</h3>

Area of a rectangle = length × width

= 8m × 7m

= 56 m²

Area of each triangle = 1/2 × base × height

= 1/2 × 4m × 7m

= 1/2 × 28

= 14m²

Total area of triangles = 2(14 m²)

= 28 m²

Area of parallelogram = area of rectangle + area of two triangles

= 56 m² + 28 m²

= 84 m²

Learn more about area of triangle:

brainly.com/question/21735282

4 0

2 years ago

Read 2 more answers

Choose the pair of events that are mutually exclusive(What is not possible?)

EleoNora [17]

An event can be considered as mutually exclusive in probability and statistics when two sample propositions cannot be held as true by any means. Therefore, the pair that clearly illustrates a mutually exclusive event would be "<span>even numbers greater than 50 and prime numbers greater than 50."</span>

5 0

4 years ago

A researcher would like to estimate p, the proportion of U.S. adults who support recognizing civil unions between gay or lesbian

Free_Kalibri [48]

Answer:

$SE = 1.96\cdot \sqrt{\frac{0.50(1-0.50)}{2222} }$

$SE = 1.96\cdot 0.0106 \\\\SE = 0.021\\\\SE = 2.1 \: \%$

The correct option is

Therefore, with a sample size of 2,222, the researcher can be 95% confident that the obtained sample proportion will differ from the true proportion (p) by no more than 2.1%

Step-by-step explanation:

The obtained sample proportion will differ from the true proportion (p) by

$SE = z\cdot \sqrt{\frac{p(1-p)}{n} }$

It is known as standard error or margin of error.

Where p is the sample proportion and n is the sample size.

Since we are not given p then we would assume

p = 0.50

That would maximize the error just to be on the safe side.

The z-score corresponding to 95% confidence level is given by

Level of significance = 1 - 0.95 = 0.05/2 = 0.025

From the z-table, the z-score corresponding to probability of 0.025 is

z-score = 1.96

So the error is

$SE = 1.96\cdot \sqrt{\frac{0.50(1-0.50)}{2222} }$

$SE = 1.96\cdot 0.0106 \\\\SE = 0.021\\\\SE = 2.1 \: \%$

So the correct option is

(c) 2.1%

Therefore, with a sample size of 2,222, the researcher can be 95% confident that the obtained sample proportion will differ from the true proportion (p) by no more than 2.1%

6 0

3 years ago

Helpppppppppp me <br> i ned help

olganol [36]

Answer:

C) 84 cm²

Step-by-step explanation:

The question is asking for the surface area of the square pyramid. So we need to get the area of all the surfaces, then add them together.

6 cm × 6 cm = 36 cm²

1/2(6 cm × 4 cm) = 12 cm² (There are 4 of these sides)

12 cm² + 12 cm² + 12 cm² + 12 cm² + 36 cm² = 84 cm²

6 0

3 years ago