How do find - S ?:/
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What is the range of this function? all real numbers such that y ≤ 40 all real numbers such that y ≥ 0 all real numbers such that 0 ≤ y ≤ 40 all real numbers such that 37.75 ≤ y ≤ 40

Identify a1 and r for the geometric sequence an= -256(-1/4) n-1

What is the number 321,000,000 in scientific notation? also what is the number? ?