Write the following numbers in scientific a)
b)
c)
4 340 000
21,4
Six and a half billion
0,004 X0,012

0,16
scientific notation. Show all workings.
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Astudent must have an average on five test that is greater than it equal to 80% but less than 90% to receive a final grade of b. devon's greades on the first four test were 78% 62% 91% and 80% what range if grades on the fifth test would give him a b in the course? ( assuming the highest grade is 100%)