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3 years ago

What is 1-blank=0.015??? Plzzz help me :)

Mathematics

1 answer:

VLD [36.1K]3 years ago

8 0

Answer:

blank = 0.985

Step-by-step explanation:

Let's say blank = x.

1 - x = 0.015

x = 1 - 0.015

x = 0.985

Therefore, blank = 0.985.

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The half-life of radioactive strontium-90 is approximately 28 years. In 1960, radioactive strontium-90 was released into the atm

pentagon [3]

Answer: It will take about 77 years (76.8 years).

Step-by-step explanation: Time is given by the equation: N=No.e^kt. You know that the concentration has to be 15% from the original so N=15 and No=100. To determine k, you have to look at the half-life. k=ln(0.5)/half-life time. For 28 years, k=-0.0247. Replacing it back into the N=No.e^kt equation, the answer will be 76.8 years.

6 0

3 years ago

Please help I don't really understand

Yakvenalex [24]

I hope this helps you

3.5/3. (x+3)

5/x+3

3 0

4 years ago

Read 2 more answers

The price of some houses in a neighborhood are shown below: House Price A $120,000 B $130,000 C $140,000 D $150,000 E $1,110,000

LenaWriter [7]

Answer:

To infer a price for the houses in that neighborhood, it is better to use the median.

Step-by-step explanation:

We have the following prices:

$ 120,000

$ 130,000

$ 140,000

$ 150,000

$ 1,110,000

Now, if we do it for the median, it is the best option, because there is a very distant value and the median is not much affected. The value that is inferred through the average is $ 140,000, a value close to the first 4 houses.

If we do it by the mean, the value would be:

(120,000 + 130,000 + 140,000 + 150,000 + 1,110,000) / 5 = $ 330000

a value very far from all the prices of the houses, this is due to the value so far from the last house.

In other words, to infer a price for the houses in that neighborhood, it is better to use the median.

4 0

4 years ago

Name the line of reflection used to map each pre-image to its image.<br> Please help

maks197457 [2]

Answer:

Step-by-step explanation:

From the picture attached,

9). When pre-image KLMN is a reflected across x = -2, we get image K'L'M'N'.

Therefore, line of reflection will be x = -2

10). In this picture line of reflection which passes through origin (0, 0) and slope = 1 will be,

y = x.

11). Since, all the points of image and preimage points are equidistant from x-axis, line of reflection will be x-axis or y = 0.

12). Line passing through midpoint of the line joining BB' will be the line of reflection.

Coordinates of B → (5, 3)

Coordinates of B' → (5, 7)

Coordinates of BB' → $(\frac{5+5}{2},\frac{3+7}{2})$ → (5, 5)

Therefore, line of reflection will be y = 5.

13). Coordinates of G → (2, 5)

Coordinates of G' → (-2, 5)

Midpoint joining the segment GG' → $(\frac{2-2}{2},\frac{5+5}{2})$ → (0, 5)

Therefore, line of reflection → x = 0

14). Line of reflection passing through (0, 0) and slope = -1

y = -x

3 0

3 years ago

A group of teens in your town meet and agree to charge a flat fee of five dollars per hour for babysitting. They charge the same

ivolga24 [154]

Answer:

B. an Oligopoly

Step-by-step explanation:

A. monopolistically competitive

This options is not correct because the number os competitors is too small to talk about monopolistic competition.

B: an Oligopoly

This options is correct since market is controlled by just a few competitors.

C. purely competitive

this is wrong because the babysitters are not competing between them.

D. a monopoly

This option is wrong because there is more than one competitor.

5 0

4 years ago