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3 years ago

12

According to this lesson, how many ice ages have occurred? A. 2 B. 3 C. 4 D. 1

2 answers:

earnstyle [38]3 years ago

6 0

Hello!

There have been 5 (major) ice ages. Names: (Huronian, Cryogenian, Andean-Saharan, Karoo Ice Age, and Quaternary glaciation.) How much does it mention?

Hope l helped!

kipiarov [429]3 years ago

5 0

I believe it is C. 4
I agree with Y∅U (sorry if I spelled it wrong), there have been 5 but in the book I used for this same question, it only listed 4.
So my final answer would be C. 4
P.S. I got the same answer correct on a test from K12.

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Megans room was remodeled. The new area of the room is 175% of the previous area. Only the length of the room changed.

Alex17521 [72]

Answer:

As only the length of the room changed. It means the length of the room is increased by 175%, because of which the area is increased by 175%.

Therefore, the expression become

$\frac{175}{100}\:l\cdot b$

$=1.75\:l\cdot b$

And the area of Megan's room is increased by 0.75 square meters.

Step-by-step explanation:

Let $l$ be the length of the room

Let $b$ be the width of the room

So the area of the rectangle will be:

$A=l\cdot \:b$

As the statement mentions that the new area of the room is $175%$ % of the previous area.

So the new area of the room becomes:

$\frac{175}{100}\:l\cdot b$

As only the length of the room changed. It means the length of the room is increased by 175%, because of which the area is increased by 175%.

Therefore, the expression become

$\frac{175}{100}\:l\cdot b$

$=1.75\:l\cdot b$

also

$\left(1.75\right)l\cdot \:b-\left(1\right)l\cdot \:b$

$=0.75\:l\cdot b$

so, the area of Megan's room is increased by 0.75 square meters.

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3 years ago

How much money would you need to deposit today at 7% annual interest

Monica [59]

Answer:

$33,090.

Step-by-step explanation:

The formula is A = P( 1 + r/2)^2n so we have:

50,000 = P(1 + 0.07/2)^(6*2)

50000 = P * 1.035^12

P = 50000/ 1.035^12

= $33,090 to the nearest dollar.

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3 years ago

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4 years ago

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blagie [28]

Answer:

Step-by-step explanation:

Ask yo teacher for help bih

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3 years ago

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devlian [24]

The quadratic formula is $x=\frac{-b\pm\sqrt{b^2-4ac} }{2a}$ .

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$x=\frac{-(-1(-1)\pm\sqrt{(-1)^2-4(1)(12)} }{2(1)}$

Because there is a square root of a negative number, there is no solution.

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4 years ago