Please help me with this I will mark you as brainliest!

Mathematics

2 answers:

Wittaler [7]3 years ago

5 0

Answer:

0.74

Step-by-step explanation:

Of the 30% of boys, 60% arrive by car, that is

60% of 30% = 0.6 × 0.3 = 0.18

Since 30% of the children at school are boys, then 70% are girls.

Of the 70% of girls, 80% arrive by car, that is

80% of 70% = 0.8 × 0.7 = 0.56

Probability of choosing a child from the school is

P( boy ) or P(girl) = 0.18 + 0.56 = 0.74

iragen [17]3 years ago

4 0

Answer:

.74

Step-by-step explanation:

First, you know that 30% are boys and 70% are girls. Then, take 60% of 30% and 70% of 80%. From there you get .74 as the probability of a randomly chosen child having taken a car to school.

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The height of Mountain P is 1,086 feet.The height of Mountain Q is 4 times the height of Mountain P.The area model shown below r

earnstyle [38]

Answer:

A=4000, B=80, C=24

Step-by-step explanation:

You forgot to put the correct area model, I attached it to the answer.

We have the fact that Mountain Q is 4 times the height of Mountain P. That's the "4" we have in the left side of our model. It's like having a multiplication table, next to the "4" we have "A" and upper this we have "1000", the only thing we have to do is multiplify 4*1000=4000. The next letter we have is B and below it we have "320", we divided it by 4, 320/4=80. The last letter we have is C, and is below a "6", we only have to multiplify it by 4, 6*4=24.

At the end we only sum our