People can obtain groundwater by drilling a well
a. above the water table.
b. into an aquifer.
c. into the unsaturated zone.
d. into the impermeable layer.

Brian's school locker has a three-digit combination lock that can be set using the numbers 5 to 9 (including 5 and 9), without repeating a number. the probability that the locker code begins with a prime number is %. the probability that the last digit of the locker code is an odd number is %.

Find the equation of the line passing through the point (–1, 5) and perpendicular to the line 3x + y = 4.

What factors influenced brazil's current and future economic strength?