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2 years ago

Help plssssss

Mathematics

1 answer:

den301095 [7]2 years ago

4 0

Answer:

Option 4

Step-by-step explanation:

Group B, because seven children have a forearm length longer than 10 inches.

Additional verification :

Finding average forearm length of Group A :

9(3) + 10(5) + 11(2) / 10
27 + 50 + 22 / 10
99/10
9.9

Finding average forearm length of Group B :

10(3) + 11(4) + 12(3) / 10
30 + 44 + 36 / 10
100/10
10

Group B clearly has the longer forearm length.

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PLS HELP!!!!!! 55 points!!!!!! Create an experiment about the probabilities associated with choosing a candidate for class presi

NemiM [27]

(How to find) Theoretical probability is what we expect to happen, where experimental probability is what actually happens when we try it out. The probability is still calculated the same way, using the number of possible ways an outcome can occur divided by the total number of outcomes.

(How to solve) Theoretical probability is a method to express the likelihood that something will occur. It is calculated by dividing the number of favorable outcomes by the total possible outcomes. The result is a ratio that can be expressed as a fraction (like 2/5), or a decimal

(How to experiment) Experimental probability is the results of an experiment, let's say for the sake of an example marbles in a bag. Experimental probability would be drawing marbles out of the bag and recording the results. Theoretical probability is calculating the probability of it happening, not actually going out and experimenting.

(Example) The theoretical probability of an event occurring is an "expected" probability based upon knowledge of the situation. It is the number of favorable outcomes to the number of possible outcomes. Example: Find the probability of rolling a 6 on a fair die.

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3 0

3 years ago

Read 2 more answers

6. What might be the opportunity cost of a large portion of your income going toward credit

julsineya [31]

You might miss out on things you would want to buy .

5 0

3 years ago

Three cards are randomly drawn from an ordinary deck of playing cards without replacement .What is the probability the first car

saveliy_v [14]

$|\Omega|=52\cdot51\cdot50=132,600\\
|A|=13\cdot51\cdot50=33,150\\\\
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8 0

3 years ago

Which of the following formulas would find the surface area of a right cone where s is the slant height r is the radius, LA is t

Darina [25.2K]

Answer:

Option A and Option C

Step-by-step explanation:

The surface area of a cone can be calculated with this formula:

$SA=\pi r^2+\pi rs$ (This matches with the option A)

Where $\pi rl$ is the lateral area of the cone (Being "s" the slant height) and $\pi r^2$ is the area of the base of the cone (which is a circle).

You know that BA the is the area of the base and LA the lateral area of the cone.

Then, substituting into the formula for calculate the surface area of a cone, you get:

$SA=BA+LA$

This matches with the option C

5 0

3 years ago

Suppose two trains leave a certain station, at the same time, traveling in opposite directions. One train travels 1010 mph fas

sweet-ann [11.9K]

Answer: speed other the slower train is 46 mph.

speed other the faster train is 56 mph.

Step-by-step explanation:

Let x represent the speed of the slower train. One train travels 10 mph faster than the other. This means that the speed of the faster train is (x + 10) mph.

In 4.5 hours, the trains are 459 miles apart. This means that the total distance travelled by both trains in 4.5 hours is 459 miles.

Distance = speed × time

Distance travelled by the slower train in 4.5 hours is

4.5 × x = 4.5x

Distance travelled by the faster train in 4.5 hours is

4.5(x + 10) = 4.5x + 45

Since the total distance covered is 459 miles, therefore,

4.5x + 4.5x + 45 = 459

9x = 459 - 45 = 414

x = 414/9

x = 46 mph

Speed of the faster train is

46 + 10 = 56 mph

3 0

3 years ago