Help my with the nath question please?

Question

A rectangle measures 87.59 cm by 35.1 mm. Express its area with the proper number of significant figures in the specified units

in cm2
in mm2
in m2

Answer 1

so 87.59cm=875.9 mm and 35.1mm=3.51 cm

A=875.9*35.1=30744.1mm2
A=87.59*3.51=307.44cm2
A=0.8759*0.0351=0.0307m2

Answer 2

First look at the two numbers. They are not the same units. Let's put this in sqmm, 87.59 cm = 875.9 mm

875.8 mm * 35.1 mm = 30740.58 sqmm

There are 10 mm in a cm. To turn a mm unit to a cm unit, we would divde by 10 (35.1 mm = 3.51 cm). To turn sqmm into sqcm, we would divide by 10 x 10 or 100.

30740.58 sqmm/ 100 = 307.4058 sqcm

If we divide by 100 again, we will get decimeters. Divide by 100 x 100 and we get sqm

307.4058 / 10000 = 0.03074058 sq m.

87.59 has four significant figures. 35.1 has three. We go to the minimum, so we are allowed three significant figures.

307 sq cm
30700 sq mm
.031 sq m or 3.07 * 10 ^ -2 sq m

Answer 3

To find the area, both sides have to the same unit (either meters, cm, or mm), so you have to convert one of the sides.

87.59 cm is equivalent to 8.759m and 875.9mm.

35.1 mm is equivalent to 3.51cm and 0.351m.

(all you are doing is moving the decimal point over left if you are going from a smaller measurement and want to a larger one like meters, or moving the decimal point to the right if you are converting a larger measurement like meters to a smaller measure like centimeters)

Now multiply.

87.59cm x 3.51cm = 307.4409cm2
35.1mm x 875.9mm = 30744.09mm2
0.351m x 8.759m = 3.074409m2

Answer 4

Convert each number to m, cm and mm and then multiply sides

Side1 = 0.8759 m, 87.59 cm, 875.9 mm
Side2 = 0.0351 m, 3.51 cm, 35.1 mm

A=0.0307 m2
A=307.44 cm2
A=30744.1 mm2

Answer 5

In cm2, first convert 35.1 into cm so it would be 3.5 then multiply 87.59 elevate at 2

in mm2, convert 87.59 into mm, so it would be 875.90 multiply by 35.1 elevated at 2

in m2, you have to convert both values in meters, so it would be 0.88 * 0.35 elevated at 2

Answer 6

we put all in one unit 35.1mm =3.51 cm

So area in cm2 A= 87.59*3.51=307.4409 cm2

as 1cm2 = 10^-4 m2 A=0.03074409m2

and as 1cm2=100mm2 A= 30474.409mm2

Answer 7

Area:
307.44 cm2
3074.4 mm2
3.074 m2