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2 years ago

Near a coral reef, a barracuda swam at a steady speed for 4.4seconds. It swam 33meters in that time. What was its speed?

Mathematics

1 answer:

PIT_PIT [208]2 years ago

3 0

Answer:

7.5 meters/second

Step-by-step explanation:

Speed = the magnitude of distance / time

Distance = 33 meters

Time = 4.4 seconds

Speed = 33 meters / 4.4 seconds = 7.5 meters/second. This is already to the tenths place, or the place right after the decimal, so we don't have to worry about rounding here.

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What kind of elements like on the periodic table? Please be more specific so I could try to help

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3 years ago

The diameters of ball bearings are distributed normally. The mean diameter is 130 millimeters and the variance is 9. Find the pr

Crank

Answer:

0.0478

Step-by-step explanation:

We solve using z score formula

z = (x-μ)/σ, where

x is the raw score = 135 mm

μ is the population mean = 130 mm

σ is the population standard deviation.

We are given variance = 9

Standard deviation = √variance = √9 = 3

Hence

z = 135 - 130/3

z = 1.66667

Probability value from Z-Table:

P(x<135) = 0.95221

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3 years ago

Mr. Johnson sells erasers for $3 each. He sold 96 erasers last week and he sold 204 erasers this week. About how much more money

notka56 [123]

Last week: 96x3=288
This week:204x3=612
Take this week and subtract from last week
612-288=324
So he made $324 more this week

3 0

3 years ago

Read 2 more answers

Suppose that in a certain sinkhole the ground dropped 69.6 ft in 24 hr. Find the unit rate representing the change in altitude p

inn [45]

Answer:

2.9 per hour

Step-by-step explanation:

Divide 69.9 by 24

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3 years ago

Find how long it takes for $500 to double if it is invested at 6% interest compounded monthly

EastWind [94]

Answer:

11.581 years

Step-by-step explanation:

Formula:

$AV=PV(1+\frac{i}{n})^{nt}\\1000=500(1+\frac{.06}{12})^{12t}\\2=1.005^{12t}\\log_{1.005}2=12t\\138.9757=12t\\t=11.5813$

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3 years ago