Write these as normal numbers 1) 7. 2 × 10^-8
2) 6.3 × 10^-9
3). 4.54×10^-5
4). 7.041×10^-10​

What is x and y intercepts for y=x+7

Given the expression (7 ? 4i) ? (2 + 6i), perform the indicated operation and write the answer in the form a + bi.

6. sarah saved $12.75 every week for a number of weeks, w. she received an additional $25 during the last week in which she saved money. write and solve an equation to find the number of weeks, w, for which sarah had saved money if she has $114.25 now.