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mr Goodwill [35]
3 years ago
6

Belle and Mabel are both 8-week-old puppies of different breeds. Belle has a mass of 12

Mathematics
1 answer:
balandron [24]3 years ago
6 0

Answer:

3:1

Step-by-step explanation:

Take the fraction and simplify it:

12/4 = 3/1

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The Jackson family is driving from Boston to New York for a summer vacation trip. So far, they have driven 84 miles which is 40%
lesantik [10]

Answer:

210

Step-by-step explanation:

just use a percentage calculator

8 0
2 years ago
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A total of 300 pine and maple trees will be planted in a park. There will be 2 pine trees planted for every 3 maple trees plante
mars1129 [50]

Answer:

  120

Step-by-step explanation:

2 of every 5 trees are pine trees.

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5 0
3 years ago
It is believed that 11% of all Americans are left-handed. In a random sample of 100 students from a particular college with 1012
tia_tia [17]

Answer:

Step-by-step explanation:

We can calculate this confidence interval using the population proportion calculation. To do this we must find p' and q'

Where p' = 14/100= 0.14 (no of left handed sample promotion)

q' = 1-p' = 1-0.14= 0.86

Since the requested confidence level is CL = 0.98, then α = 1 – CL = 1 – 0.98 = 0.02/2= 0.01, z (0.01) = 2.326

Using p' - z alpha √(p'q'/n) for the lower interval - 0.14-2.326√(0.14*0.86/100)

= -2.186√0.00325

= -2.186*0.057

= 12.46%

Using p' + z alpha √(p'q'/n)

0.14+2.326√(0.14*0.86/100)

= 0.466*0.057

= 26.5%

Thus we estimate with 98% confidence that between 12% and 27% of all Americans are left handed.

6 0
3 years ago
Which of the following is a solution to 2cos^2x– 2 = 0 ?
Sphinxa [80]

Answer:

A and C

Step-by-step explanation:

Given

2cos²x - 2 = 0 ( add 2 to both sides )

2cos²x = 2 ( divide both sides by 2 )

cos²x = 1 ( take the square root of both sides )

cos x = ± \sqrt{1} = ± 1

cos x = 1 ⇒ x = cos^{-1}(1) = 0°

cos x  = - 1 ⇒ x = cos^{-1}(- 1) = 180°

8 0
3 years ago
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In which year was the profit, the difference between the income and costs, the greatest?
Kitty [74]
A is the answer ....................................
8 0
3 years ago
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