In scientific notation, what is the sum of 2.3 times 10^{-3} and 5.4 times 10^{-4}?a. 2.84 times 10^{-3}b. 5.63 times 10^{-3}c. 7.7 times 10^{-7}d. 12.42 times 10^{-12}
Answers
2.3 x 10⁻³ 5.4 x 10⁻⁴
It is better to add this using standard form because these two have different decimal places.
2.3 x 10⁻³ ⇒ 0.00230 5.4 x 10⁻⁴ ⇒ 0.00054 0.00284
0.00284 in scientific notation is 2.84 x 10⁻³
tony spent $60.54 and bought 3 packs of notebooks and a calculator. how much does a pack of notebooks cost if a calculator costs $45.87
Answers
First you need to find out the remaining value after he bought the calculator this would be 14.67.
60.54 - 45.87= 14.67
Next youll assume the packs of notebooks all cost the same and divide by 3
14.67 / 3 = 4.89
He spent 4.89 on one pack of notebooks
Plz help. Thank you!
Answers
The new surface area will be 9 times the old surface area.
So A or #1
How do you work this problem? 5+1/7b=-2
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b= -49 5+1/7b=-2 1/7b=-2-5 1/7b=-7 B= -7 divied by 1/7 B= -7 x 7/1 B= -7 x 7 B= -49
b=-7x7 = b=49 so 7 times 7 equals 49
a painter has a 24-foot ladder that he is using to paint a house. for safety reasons, the ladder must be placed at least 8 feet from the base of the side of the house. to the nearest tenth of a foot, how high can the ladder safely reach
Answers
c=24 b=8 a=? a2=c2-b2 a2=(24)2-(8)2 a2=576-64 a2=512 take LCM a=22.627.....
How many outcomes are there for the event of rolling a 6-sided number cube and then spinning a 10-part spinner?