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3 years ago

Mark bikes 4/10 of a mile in 1/5 of an hour. Find marks average speed in miles per hour.

Mathematics

1 answer:

Triss [41]3 years ago

6 0

He bikes 4/10 of a mile in 1/5 of an hour

That is 4/10 miles in 1/5 hours

Average speed = Distance/ time = 4/10 ÷ 1/5 = 4/10 × 5/1 = 2 miles/hour

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Write an exponential function in the form y = ab that goes through points (0,4) and (2, 196).

yawa3891 [41]

Answer:

y = 4 $(7)^{x}$

Step-by-step explanation:

The form of the exponential function is y = a $b^{x}$

Use the given points to solve for a and b

Using (0, 4 ), then

4 = a $b^{0}$ ( $b^{0}$ = 1 ), thus a = 4

y = 4 $b^{x}$

Using (2, 196 ), then

196 = 4b² ( divide both sides by 4 )

49 = b² ( take the square root of both sides )

b = $\sqrt{49}$ = 7

y = 4 $(7)^{x}$ ← exponential function

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3 years ago

A 98% confidence interval for a proportion is found to be (0.62, 0.68).

Vilka [71]

Answer:

I think the answer is C ,The sample proportion is the fraction of samples which were successes, so. (1) For large , has an approximately normal distribution.

Step-by-step explanation:

If the queston true please votes 5 stars and mark as brainliest for me.Thank you so much

3 0

2 years ago

Write the answer in simplest form: 5/6 − 3/5 I need this ASAP pls help

RSB [31]

Answer:

the answer is 7/30 (answer is .23 repeating)

3 0

2 years ago

Divide ( - 3 z 2 – 15z )÷ ( z + 5 )

blondinia [14]

Factor the numerator to get:

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-3z

4 0

3 years ago

What is the next number? 2+3=8 3+7=27 4+5=32 5+8=60 6+7=72 7+8=?

ale4655 [162]

Answer:

Step-by-step explanation:

2 + 3 = 8

8 : 2 = 4; 4 - 1 = 3 (subtract 1)

3 + 7 = 27

27 : 3 = 9, 9 - 2 = 7 (subtract 2)

4 + 5 = 32

32 : 4 = 8; 8 - 3 = 5 (subtract 3)

5 + 8 =60

60 : 5 = 12, 12 - 4 = 8 (subtract 4)

6 + 7 = 72

72 : 6 = 12, 12 - 5 = 7 (subtract 5)

7 + 8 = x

x : 7 = y, y - 6 = 8 (subtract 6)

Solve:

y - 6 = 8 add 6 to both sides

y - 6 + 6 = 8 + 6

y = 14

x : 7 = y ⇒ x : 7 = 14 ⇒ x = (14)(7) ⇒ x = 98

8 0

3 years ago