How many days will it take a culture of bacteria to increase from 400 to 40,000 if the growth rate
is 83.4% per day?
A. 7.1 days
B. 7.4 days
C. 7.6 days
D. 7.9 days

Anyone know? will mark brainliest if you're correct!

Find the volume of the described solid.the solid lies between planes perpendicular to the x-axis at x = 0 and x=7. the cross sectionsperpendicular to the x-axis between these planes are squares whose bases run from the parabolay=-31x to the parabola y = 30/x.a) 441b) 147c) 864d) 882

What are the equivalent ratios for 24/2= /3= /5.5=108/ = /15