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2 years ago

13

The fastest elevators in the Burj Khalifa can travel 330 feet in just 10 seconds. How far does the elevator travel in 11 seconds

? Explain your reasoning.

1 answer:

charle [14.2K]2 years ago

6 0

Answer:

360

Step-by-step explanation:

rafts and the kids have a good day at the house so we will have a great day

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Write the value of a in terms of b if the line joining (b,20) and (4,a) has a slope of −5 .

Sidana [21]

The correct answer is -4^5-7/4

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2 years ago

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2 years ago

Questions (no partial grades if you don't show your work) 1. In a group of 6 boys and 4 girls, four children are to be selected.

mariarad [96]

Answer:

Total number of ways will be 209

Step-by-step explanation:

There are 6 boys and 4 girls in a group and 4 children are to be selected.

We have to find the number of ways that 4 children can be selected if at least one boy must be in the group of 4.

So the groups can be arranged as

(1 Boy + 3 girls), (2 Boy + 2 girls), (3 Boys + 1 girl), (4 boys)

Now we will find the combinations in which these arrangements can be done.

1 Boy and 3 girls = $^{6}C_{1}\times^{4}C_{3}=6\times4$ =24

2 Boy and 2 girls= $^{6}C_{2}\times^{4}C_{2}=\frac{6!}{4!\times2!}\times\frac{4!}{2!\times2!}=15\times6=90$

3 Boys and 1 girl = $^{6}C_{3}\times^{4}C_{1}=\frac{6!}{4!\times2!}\times\frac{4!}{3!}=\frac{6\times5\times4}{3 \times2} \times4=80$

4 Boys = $^{6}C_{4}=\frac{6!}{4!\times2!} =\frac{6\times 5}{2\times1}=15$

Now total number of ways = 24 + 90 + 80 + 15 = 209

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3 years ago

1) There are about 20 million people in New York State, with a total land area of about 47,000 square miles.

Nata [24]

Step-by-step explanation:

B. 426 people per square. mile

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2 years ago

How much is 5/6 times 2 3/4

Anit [1.1K]

5/6 x 2 3/4 = 5/6 x (2x4+3)/4 = 5/6 x 11/4 = 55/24 = 2 7/24

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3 years ago

Read 2 more answers