Keeping in mind the rules for significant dig- its, what is the product of 0.6906 m and 4.03
m?

2.78

Explanation:

When multiplying, your answer will have the same amount of sig figs as the multicand or multiplier that has the lower number of sig figs. In this case, 4.03 is the one with the lowest number of sigs figs, which is 3 sig figs, so the answer should have 3 sig figs, so the answer is 2.78.

14 days is the half-life of phosphorus-32

i just calculated it all out, and not including weekends, and all the different days off. as of this school year (2018-2019) students are spending 2198 hours in school this year