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3 years ago

What evidence do scientists have that erosion works slowly over long periods of time?

1 answer:

4 0

A noticeable evidence is that the Amazon was formed as a result of wearing away that has occurred over millions of years. Another good example is the Grand Canyon in the United States of America, it was formed as a result of erosion that occurred over 3 million years.

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How many combinations? 3 flavors 5 toppings whip or no whip cream

Triss [41]

Answer:

Step-by-step explanation:3 flavors and 5 toppings multiplied is 15, and whip or no whip is a extra 2 choices so 15x2=30

6 0

3 years ago

Read 2 more answers

Please help I’m being timed.

MAXImum [283]

Answer:

da answerr is six

if DF is 6 and all sides are equal in length the EF side is going to be 6 as well

3 0

3 years ago

Read 2 more answers

A normal distribution has a mean of 10 and a standard deviation of 1. What is the probability of selecting a number that is at m

Andrei [34K]

Answer:

15.87% probability of selecting a number that is at most 9

Step-by-step explanation:

6 0

3 years ago

()) A rectangular piece of paper has a perimeter of 22 inches and an area of 28 square

Natasha2012 [34]

Given:

Perimeter of a rectangular paper = 22 inches.

Area of the rectangular paper = 28 square inches.

To find:

The dimensions of the rectangular paper.

Solution:

Let l be the length and w be the width of the rectangular paper.

Perimeter of a rectangle is:

$P=2(l+w)$

Perimeter of a rectangular paper is 22 inches.

$2(l+w)=22$

$l+w=\dfrac{22}{2}$

$l=11-w$ ...(i)

Area of a rectangle is:

$A=lw$

Area of the rectangular paper is 28 square inches.

$28=lw$

Using (i), we get

$28=(11-w)w$

$28=11w-w^2$

$w^2-11w+28=0$

Splitting the middle term, we get

$w^2-7w-4w+28=0$

$w(w-7)-4(w-7)=0$

$(w-7)(w-4)=0$

Using zero product property, we get

$(w-7)=0\text{ and }(w-4)=0$

$w=7\text{ and }w=4$

If $w=7$ , then by using (i)

$l=11-7$

$l=4$

If $w=4$ , then by using (i)

$l=11-4$

$l=7$

Therefore, the dimensions of the paper are either $7\times 4$ or $4\times 7$ .

5 0

3 years ago

Rosa works in an office building with many floors. From her office, she goes down 2 floors for a meeting. Then, she goes up 7 fl

Korvikt [17]

Since Rosa ends up on the first floor, we'll set the equation equal to 1. We don't know Rosa's floor, so we'll set her floor as the unknown x. When she goes down, we'll subtract from her floor (x) and when she goes up, we'll add.

x= Rosa's floor
down 2= subtract 2
up 7= add 7
down 15= subtract 15
ends up on 1 so equation equals 1

x - 2 + 7 - 15= 1
combine like terms
x - 10= 1
add 10 to both sides
x= 11

ANSWER:
Rosa works on the 11th floor

Hope this helps! :)

8 0

3 years ago