10) The population of humans living on the Earth has increased tremendously due to scientific discoveries and technology. Which
statement BEST summarizes how science and technology have contributed to human population growth?
A)
Science and technology have increased the human birth rate.
B)
Science and technology have been crucial in opening up new areas for
human development.
Science and technology have allowed for an increased emphasis on
education and the arts.
C)
D)
Science and technology have increased food and reduced death rates due
to illness and malnutrition.

The correct answer would be

D. Science and technology have increased food and reduced death rates due to illness and malnutrition.

I took this on USATestPrep, it's 100% right

a solenoid is created by wrapping a l = 90 m long wire around a hollow tube of diameter d = 4.5 cm.   the wire diameter is d = 0.9 mm.   the solenoid wire is then connected to a power supply so that a current of i = 9 a flows through the wire.

randomized variablesl = 90 m

d = 4.5 cm

d = 0.9 mm

i = 9 a                                          

write an expression for the number of turns, n, in the solenoid. you do not need to take into account the diameter of the wire in this calculation.

calculate the number of turns, n, in the solenoid.

write an expression for the length of the solenoid (l2) in terms of the diameter of the hollow tube d.

calculate the length of the solenoid (l2)   in meters.

calculate the magnitude of the magnetic field at the center of the solenoid in teslas.

explanation:

wavelegth as in spectrum red oygbiv