Can someone help me with this? 8x10^9
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5x10^4

Write answer in scientific notation
(Will give brainliest)

Express the following as a function of a single angle, cos(60) cos(-20) - sin(60) sin(-20)

Write the rational number in lowest terms 99/-15

Which sentence uses an objective tone? we will plant the best garden of any school in the area. the new campus garden will surely be envied by other schools. a garden would provide numerous benefits to the students. you will probably agree that gardens have many benefits.