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3 years ago

13

The current in a stream moves at a speed of 5 km/h. A boat travels 20 km upstream and 20 km downstream in a total of 3 hours. Fi

nd the speed of the boat in still water.

1 answer:

Hatshy [7]3 years ago

5 0

Answer:

14

Step-by-step explanation:

im right

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And a survey of 500 households 23% say that they have a dog as a pet the standard deviation is 2% determine an interval that if

hammer [34]

Answer:

(114.123, 115.877)

Step-by-step explanation:

Given that :

Sample size (n) = 500

Mean = 23% of 500 = 115

Standard deviation (s) = 2% of 500 = 10

α = 95%

Zcritical at 95% = 1.96

Confidence interval = Mean ± Error

Error = Zcritical * standard deviation /sqrt (n)

Error = 1.96 * 10/sqrt(500)

Error = 0.8765386

Lower boundary : 115 - 0.8765386 = 114.1234614

Upper boundary : 115 + 0.8765386 = 115.8765386

(114.123, 115.877)

6 0

3 years ago

A snail is traveling at a rate of 1.5 feet per minute. Write the rate in feet per second. Write the rate in feet per hour

Luden [163]

1 m = 1.5 ft
1 sec = 0.025 ft
1 hour = 90 ft

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3 0

3 years ago

When b > 1, as x grows in the negative direction, y______ . When 0 < b < 1, as x grows in the negative direction, y____

sweet-ann [11.9K]

Answer:

decrease, increase.

Step-by-step explanation:

3 0

3 years ago

suppose that 11 inches of wire cost 66 cents at the same rate how much (in cents) will 28 inches of wire cost

zvonat [6]

Answer:

168 cents or = $1.68

Step-by-step explanation:

11 inches of wire cost 66 cents

28 inches of wire cost x? cents

x = 28 * 66 / 11 = 168 cents or = $1.68

Answer

168 cents or = $1.68

3 0

3 years ago

Two angles in a triangle have measures of 62 and 15.

Radda [10]

Answer:

A) 103

Step-by-step explanation:

x + 62 + 15 = 180

x + 77 = 180

x = 103

8 0

3 years ago

Read 2 more answers