Just line up the decimals and then you add. But after you finished adding, make sure you just straight up bring the decimal down to your final answer to the question.

6 0

3 years ago

Compare the expressions. 40 -16 plus 10 ? -20 plus 18 plus 30

Harman [31]

We just need to do come computation:

$40-16+10 = 40+(-16+10) = 40+(-6) = 40-6=34$

$-20+18+30 = -2+30 = 28$

So, we have 34>28

8 0

2 years ago

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Astronomy: At is closest approach, Mars is about 5.6X10^7 km from Earth and its apparent size is about 0.00012 radians. What is

Mariana [72]

1.) D = 2pi * d * A / 360 degrees; Where:
pi = 3.14;
d = distance or 56,000,000 km (5.6x10^7 to standard notation)
A = angular size in degrees or .00688 degrees (.00012 radian to degrees)

D = 2(3.14) * 56,000,000 * .00688 / 360
= 6.28 * 385,280 / 360
= 2,419,558.4 / 360
D = 6,720.996 or 6,721

Therefore, 6,721 km. is the approximate diameter of Mars.

6 0

2 years ago

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