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2 years ago

BRAINLIEST PLUS 30 points IF CORRECT. NO SPAMMING OR LINKS.

Mathematics

1 answer:

Contact [7]2 years ago

5 0

Answer:

answer: 1/8

Step-by-step explanation:

because the probability of getting a nickel is 2/4 and the probability of getting a quarter is 1/4 now when I multiply them together 2/4 × 1/4 = 1/8 Hope that helps!

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Select the correct answer from each drop-down menu. A teacher is making a history test composed of the same number of multiple-c

GaryK [48]

Answer:

Step-by-step explanation:idbdhides by

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3 years ago

A huge ice glacier in the Himalayas initially covered an area of 454545 square kilometers. Because of changing weather patterns,

guajiro [1.7K]

We have been given that a huge ice glacier in the Himalayas initially covered an area of 45 square kilo-meters. The relationship between A, the area of the glacier in square kilo-meters, and t, the number of years the glacier has been melting, is modeled by the equation $A=45e^{-0.05t}$ .

To find the time it will take for the area of the glacier to decrease to 15 square kilo-meters, we will equate $A=15$ and solve for t as:

$15=45e^{-0.05t}$

$\frac{15}{45}=\frac{45e^{-0.05t}}{45}$

$\frac{1}{3}=e^{-0.05t}$

Now we will switch sides:

$e^{-0.05t}=\frac{1}{3}$

Let us take natural log on both sides of equation.

$\text{ln}(e^{-0.05t})=\text{ln}(\frac{1}{3})$

Using natural log property $\text{ln}(a^b)=b\cdot \text{ln}(a)$ , we will get:

$-0.05t\cdot \text{ln}(e)=\text{ln}(\frac{1}{3})$

$-0.05t\cdot (1)=\text{ln}(\frac{1}{3})$

$-0.05t=\text{ln}(\frac{1}{3})$

$t=\frac{\text{ln}(\frac{1}{3})}{-0.05}$

$t=\frac{\text{ln}(\frac{1}{3})\cdot 100}{-0.05\cdot 100}$

$t=\frac{\text{ln}(\frac{1}{3})\cdot 100}{-5}$

$t=-\text{ln}(\frac{1}{3})\cdot 20$

$t=-(\text{ln}(1)-\text{ln}(3))\cdot 20$

$t=-(0-\text{ln}(3))\cdot 20$

$t=20\text{ln}(3)$

Therefore, it will take $20\text{ln}(3)$ years for area of the glacier to decrease to 15 square kilo-meters.

6 0

2 years ago

A jury of 12 people is chosen from 20 men and 30 women. What is the probability that

vladimir1956 [14]

Answer:

6 men 6 women or 2 men 10 women

6 0

2 years ago

Last year, your store had total sales of $190,000. Because of a downturn in the economy, you expect sales to decrease by 3% this

Sunny_sXe [5.5K]

A because if you take the 190000 and multiply it by 3% and then subtract which is 5700 and take 190000 and subtract it by 5700 it will give u the answer is 184300

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3 years ago

HELP ME PLEASE I DONT UNDERSTAND THIS !!!

ioda

The car is speeding at a rate of 33.3mph

<h3>Speed and distance of an object</h3>

If a certain car going 60 mph can stop in 180 ft, then we can express this as:

60mph = 180ft

To determine the speed for a car traveling at 100ft, we will have:

x = 100ft

Take the ratio of the expression

60/x = 180/100
180x = 6000

x = 33.3mph

Hence the car is speeding at a rate of 33.3mph

learn more on speed here: brainly.com/question/4931057

6 0

2 years ago