I’m pretty sure the answer is a ?

Bianca makes a scale drawing of a rectangular garden. The length is 9 in., and the width is 6 in. Bianca changes the scale of th

Artist 52 [7]

Old scale : 1 in. to 3 ft.
length is 9 in.....9 * 3 = 27 ft (old scale length)
width is 6 in......6 * 3 = 18 ft (old scale width)

new scale : 1 in. to 4 ft
length is 9 in.....9 * 4 = 36 ft (new scale length)
width is 6 in......6 * 4 = 24 ft (new scale width)

4 0

3 years ago

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An earthquake causes a 3 kg book to fall from a shelf. If the book lands with a speed of 4.0 m/s, from what height did it fall?

r-ruslan [8.4K]

Given:
3kg book
speed of falling of 4.0 m/s
acceleration due to gravity -9.8 m/s²

Vf² = Vi² + 2 * a * d

Vf = final velocity ; Vi = initial velocity ; a = acceleration ; d = distance

0² = (4 m/s)² + 2(-9.8m/s²) * d
0 = 16 m²/s² -19.6 m/s² * d
-16 m²/s² = -19.6 m/s² * d
-16 m²/s² / -19.6 m/s² = d
0.82 m = distance

The 3 kg book fell from the a shelf at the height of 0.82 meters.

6 0

3 years ago

I need help with this please!! Thanks in advance!!

Tcecarenko [31]

Dis is what I think of this problem I can't answer this sorry :-(

4 0

3 years ago

On the most recent district-wide math exam, a random sample of students earned the following scores:

kirza4 [7]

Answer:

mean=80.833

median=84.5

Step-by-step explanation:

scores:

95,45,37,82,90,100,91,78,67,84,85,85,82,91,93,92,75,84,100,59,92,77,68,88

we arrange the scores in ascending order

37,45,59,67,68,75,77,78,82,82,84,84,85,85,88,90,91,91,92,92,93,95,100,100

mean=sum of all observations/total number of observations

= 1940/24

=80.833

median is the central tendency of all observations

median lies between 84 and 85

median=(84+85)/2

= 84.5

3 0

3 years ago

If the sales price of a toy car is $64, including a 20% discount, what was the regular price of the toy card before the discount

Colt1911 [192]

Hi there! So the toy car was on sale for 20%, and the sale price is $64. To find the original price of the toy car, we can write and solve a proportion. Set it up like this:

64/x = 80/100

This is because 64 is part of the whole, which is the original price, and although you get a 20% discount, you still have to pay 80% of the original price, which is why 80 is over the 100, in stead of 20. Let's cross multiply the values. 64 * 100 is 6,400 and 80 * x is 80x. That leaves 6,400 = 80x. Now, divide each side by 80 to isolate the x. 80x/80 cancels out. 6,400/80 is 80. We found the number, but let's check it. 80 * 80% (0.8) is 64. There. x = 80. The regular price of the toy car was $80.

3 0

3 years ago