What is the value of x?
1 answer:
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To convert our number to scientific notation, we are going to move the decimal point to the right until we have only one non-zero digit to the left of the decimal point, and then, we are going to multiply that number by a negative power of 10 equal to the number of times we moved the decimal point to the right:
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Our number is 0.000000016, so we need to move the decimal point 8 times to the right to have </span>only one non-zero digit to the left of the decimal point (1.6). Since we moved the decimal point eight times to the right, we are going to multiply 1.6 by y a negative power of 10 equal to the number of times we moved the decimal point to the right i.e.
.
So 0.000000016 expressed in scientific notation is 1.6x
, or in calculator notation 1.6E-8
We can conclude that the correct answers are <span>1.6E-8 and </span><span>1.6 × 10-8</span>
<span>
Our number is 0.000000016, so we need to move the decimal point 8 times to the right to have </span>only one non-zero digit to the left of the decimal point (1.6). Since we moved the decimal point eight times to the right, we are going to multiply 1.6 by y a negative power of 10 equal to the number of times we moved the decimal point to the right i.e.
So 0.000000016 expressed in scientific notation is 1.6x
We can conclude that the correct answers are <span>1.6E-8 and </span><span>1.6 × 10-8</span>
Answer:
The Distance cover by Brandy rod at slower speed of bike is 61.2 miles .
Step-by-step explanation:
Given as :
The total distance cover by Brady rode with bike = d = 70 miles
The total time taken by Brady rode with bike = 4 hours
The time taken for average speed of 17 mph = t hours
Let The time taken for average speed of 22 mph = (4 - t) hours
Let The distance cover for slower speed = d miles
<u>Now, From formula </u>
Distance = speed × time
So, Total distance cover = distance at slower speed + distance at faster speed
Or, 70 miles = 17 mph × t hours + 22 mph × (4 - t) hours
Or, 70 = 17 t + 22 × 4 - 22 × t
or, 70 = 88 + 17 t - 22 t
or, 22 t - 17 t = 88 - 70
or, 5 t = 18
∴ t =
i.e t = 3.6 hours
So, The time taken for average speed of 17 mph = t = 3.6 hours
And The time taken for average speed of 22 mph = (4 - 3.6) = 0.4 hour
So, Distance cover at slower speed = slower speed × time at slower speed
i.e d = 17 mph × 3.6 h
Or, d = 61.2 miles
So, Distance cover at slower speed = d = 61.2 miles
Hence, The Distance cover by Brandy rod at slower speed of bike is 61.2 miles . Answer