Are you asking for the letter or what the line is called because if it's just the letter then it is r if it is the name then its a plane intersect.
A) as the exponent decreases by one, the number is divided by 5
B) as the exponent decreases by one, the number is divided by 4
C) as the exponent decreases by one, the number is divided by 3
D) 4⁰ = 4 ÷ 4 = 1
4⁻¹ = 1 ÷ 4 = 
4⁻² =
÷ 4 = 
E) 3⁰ = 3 ÷ 3 = 1
3⁻¹ = 1 ÷ 3 = 
3⁻² =
÷ 3 = 
50 / 0.40 = 125
To check your answer, 125 * 0.4 = 50
Measurement is the numerical quantitation of the attributes of an object or event, which can be used to compare with other objects or events. The scope and application of measurement are dependent on the context and discipline
A
100+89.50×36
=3,322
b
3,322−2,900
=422
c
2,900÷89.50
=33