A code is required to get into the school computer lab. • The code has four digits
The first digit must be 1
The last digit must be even
• The digit 0 is not used.
.
.
How many possible codes are there to get into the computer lab?
A 24
B) 324
C 405
D) 6561

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

Which representation has a constant of variation of -2.5

Yesterday, george drank 1 small bottle and 2 large bottles, for a total of 1,372 grams. the day before , he drank 1 small bottle and 1 large bottle, for the total of 858 grams. how many grams does each bottle hold?