Answer:
12.67 minutes
Step-by-step explanation:
Time taken is given by distance divided by speed
Given distance of 228, 000, 000 km and speed of light as 300, 000 km/s then time will be
Time=228, 000, 000/300, 000=760 seconds
Conversion
60 seconds make up 1 minute
760 seconds will be 760/60
Time=760/60=12.666666666666
Rounded off, this is 12.67 minutes
5 Simplify the radical by breaking the radicand up into a product of known factors, assuming real numbers.
We have 16 ounces of 3% H2O2
How many ounces of 30% H2O2 do we add to make a 10% H2O2 solution?
let x = amount of ounces of 30% H2O2 to add
.03 * 16 + .30x = .10 * (16 + x)
.48 + .30x = 1.6 + .1x
.2x = 1.12
x = 5.6 ounces
Source:
https://www.1728.org/mixture.htm