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frosja888 [35]
3 years ago
12

Hannah completed 40 problems in 32 minutes. I have to put it in a unit rate pls help

Mathematics
1 answer:
il63 [147K]3 years ago
5 0

Answer: 1.25 problems/min

32 minutes --> 40 problems

1 minute --> 40/32

                --> 1.25

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A market research firm studied the waiting time to order drinks during breakfast time at drive-thru in two coffee shop chains. F
jeka57 [31]

Answer:

Yes

Step-by-step explanation:

Given that :

CHAIN A:

Sample size n1 = 30

Sample standard deviation of waiting time s1 = 21.2

CHAIN B:

Sample size, n2 = 28

Sample standard deviation of waiting time s2 = 31.4

Null hypothesis H0: s1 = s2

Alternative hypothesis H1: s1 < s2

Test statistic ; Ftest : s1² / s2²

Ftest = 21.2^2 / 31.4^2

= 0.4558399

P value from F statistic : = 0.02 (using p value calculator)

Since the pval < 0.05

Then we reject the Null ; Chain A waiting time is more consistent

5 0
3 years ago
Which transformations could be performed to show that △ABC is similar to △A"B"C"? A reflection over the x-axis, then a dilation
amm1812

Answer:

Option D.

Step-by-step explanation:

If two triangles ΔABC and ΔA'B'C' are similar then we take point C of ΔABC to find the transformation performed form C to C'.

Coordinates of C are (0, 3) and the coordinates of C' are (0, -1).

This shows that C is rotated 180° about origin to get the new coordinates as (0, -3) and then new coordinates were dilated by 1/3 which forms C' as (0, -1)

Therefore option D is the correct option.

5 0
4 years ago
Read 2 more answers
A cube shaped tissue box is made entirely of cardboard. The tissue box has a length of 5 in.
Daniel [21]
A cube has equal length, height and depth.

The area of one face is 5inches * 5inches, which would equal 25inches^2.

Multiply this by 6, for the 6 faces on a cube, and we get 150inches^2 of cardboard.
5 0
4 years ago
Read 2 more answers
HELP PLS the problem is in the picture below
Gnoma [55]
I think it’s the first one
Sorry if I’m wrong
4 0
3 years ago
Need help!! plzz help​
Alex

Answer:

it's 18

Step-by-step explanation:

because

3×9=18

so u do the same thing for 2

2×9=18

and u could reduce it to

9/14

6 0
3 years ago
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