9. Determine how long it takes for 80% of the material to decay. lodine 131, used in nuclear medicine, initial amount 85 milligrams, half-life 8 days.

Jonathan pays $1.90 per pound for potatoes. he buys 8.3 pounds of potatoes. he determines that he will pay $15.77, before tax, for the potatoes. which best describes the reasonableness of jonathan’s solution? jonathan’s answer is reasonable because there are two decimal places in the factors and two in the product. jonathan’s answer is unreasonable because there are three decimal places in the factors and two in the product. jonathan’s answer is reasonable because is 16, and 16 is close to 15.77. jonathan’s answer is unreasonable because is 8, and 8 is not very close to 15.77.

What are the soultion(s) to the quadratic equation 40- x^2=0

Adriveway is 40 yards long about how many meters long is it