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3 years ago

How to find the height of a tree in cm. 5m and 4m equal how many cm

Mathematics

2 answers:

KatRina [158]3 years ago

8 0

100cm=1m 5÷100=0,05 4÷100=0,04 5m=0,05cm 4m=0,04cm

erastova [34]3 years ago

3 0

The answer is 9 cm

Hope that helps! :)

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7x+2y=-19 and -x+2y=21

Fittoniya [83]

Subtract the 2 equations

7x+2y=-19
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x= -1/4

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3 years ago

What are the eletric charges of three subatomic particles

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Answer:

Step-by-step explanation:

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The number of goldfish in a tank is 12, and the volume of the tank is 45 cubic feet. What is the density of the tank?

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3 years ago

Read 2 more answers

What does h-13=184 equal

34kurt

Answer:

h = 197

Step-by-step explanation:

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3 years ago

An ice cube is melting, and the lengths of its sides are decreasing at a rate of 0.8 millimeters per minute At what rate is the

julia-pushkina [17]

Answer:

The rate of decrease is: $43.2mm^3/min$

Step-by-step explanation:

Given

$l = 18mm$

$\frac{dl}{dt} = -0.8mm/min$ ---- We used minus because the rate is decreasing

Required

Rate of decrease when: $l = 18mm$

The volume of the cube is:

$V = l^3$

Differentiate

$\frac{dV}{dl} = 3l^2$

Make dV the subject

$dV = 3l^2 \cdot dl$

Divide both sides by dt

$\frac{dV}{dt} = 3l^2 \cdot \frac{dl}{dt}$

Given that: $l = 18mm$ and $\frac{dl}{dt} = -0.8mm/min$

$\frac{dV}{dt} = 3 * (18mm)^2 * (-0.8mm/min)$

$\frac{dV}{dt} = 3 * 18 *-0.8mm^3/min$

$\frac{dV}{dt} = -43.2mm^3/min$

<em>Hence, the rate of decrease is: 43.2mm^3/min</em>

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3 years ago