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Nostrana [21]
3 years ago
5

How long does it take the otter to swim 90 feet?

Mathematics
2 answers:
marta [7]3 years ago
8 0

Answer:

11 sec

Step-by-step explanation:

90 (distance) /8.21333 (feet per sec.)= 11

inysia [295]3 years ago
5 0

Answer:

15-20 Sec

Step-by-step explanation:

If its a professional the it would take that many.

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A sports magazine claims that in a certain country, 45% of people like soccer A news channel asked 30 randomly selected people i
LiRa [457]

Answer:

Step-by-step explanation:

Hello!

The parameter of interest is "the population proportion of people that like soccer A news channel"= p

The hypothesis are:

H₀: p = 0.45

H₁: p ≠ 0.45

To study the population proportion you have to use the approximation of the standard normal distribution:

Z= \frac{p'-p}{\sqrt{\frac{p(1-p)}{n} } } ≈ N(0;1)

A sample of n=30 was taken and surveyed, 18 of those answered positively, then the sample proportion is:

p'= 18/30= 0.6

The statistic under the null hypothesis is:

Z_{H_0}= \frac{0.60-0.45}{\sqrt{\frac{0.45*0.55}{30} } } = 1.6514

I hope it helps!

6 0
3 years ago
HELP PLEASE 50 POINTS!!!!!!!!!!!!!!!
Sladkaya [172]
1) m= -3 (13/3,0)

2) m= -2 (1/2,0)
3 0
3 years ago
1 ten and 15 ones in word
wolverine [178]
25 in total what do you mean
4 0
3 years ago
HELP PLSSSS I WILL GIVE A BRAINLY AND 20 POINTS!!
Lubov Fominskaja [6]

Answer:

y=x-4 or f(x)=x-4

Step-by-step explanation:

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7 0
2 years ago
9.4 the tangent ratio<br> please help on #27 and 28
Ilya [14]

Answer/Step-by-step explanation:

27.

✔️Sin 23 = opp/hyp

Sin 23 = t/34

34*sin 23 = t

t = 13.3

✔️Cos 23 = adj/hyp

Cos 23 = s/34

s = 34*cos 23

s = 31.3

28.

✔️Sin 36 = opp/hyp

Sin 36 = s/5

s = 5*sin 36

s = 2.9

✔️Cos 36 = adj/hyp

Cos 36 = r/5

r = 5*cos 36

r = 4.0

29.

✔️Sin 70 = opp/hyp

Sin 70 = w/10

w = 10*sin 70

w = 9.4

✔️Cos 70 = adj/hyp

Cos 70 = v/10

v = 10*cos 70

v = 3.4

6 0
3 years ago
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