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Troyanec [42]
3 years ago
12

Does anyone know the answer to this?

Mathematics
2 answers:
Vlada [557]3 years ago
7 0
X=20
Hehehheheheheheheh
Ber [7]3 years ago
5 0
I think it is x=20 like he said
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bulgar [2K]

Answer:

76.64 hope this helps!

3 0
3 years ago
Y varies directly with x. If y=3 when x=4, find y when x=20.
mina [271]
X=15

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8 0
3 years ago
If the variance of the water temperature in a lake is 30°, how many days should the researcher select to measure the temperature
Jet001 [13]

Answer: The number of days would be 7 days.

Step-by-step explanation:

Since we have given that

Variance = 30°

Standard deviation = √30 =  5.47

Mean = 4°

At 95% confidence, z = 1.96

So, number of days that the researcher select to measure the temperature would be

n=(\dfrac{z\times \sigma}{error})^2\\\\n=(\dfrac{1.96\times 5.42}{4})^2\\\\n=7.053\\\\n=7

Hence, the number of days would be 7 days.

3 0
4 years ago
a dice was to be rolled 10 times. the first 7 rolls were even. What is the probability of the 8th roll being odd numbered.
Basile [38]
The probability of the 8th roll being odd would still be 1/2  the first seven rolls won't change anything
3 0
3 years ago
DUE IN 2 MINTUES PLZZ HELP
zubka84 [21]

Answer:

1152000 ft or 218.18 miles

Step-by-step explanation:

6400 x 60 (60 minutes in an hour) = 384000 ft

384000 = one hour at top speed

384000 x 3 = 1152000 ft (3 hours at speed)

There is 5280 feet in a mile

1152000 / 5280 = 218.18 miles

brainliest if this was helpful

8 0
3 years ago
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