Answer:
Yes i'm pretty sure
Step-by-step explanation:
Answer:
D) 20,800,000
Step-by-step explanation:
Part A: Students from high school B is the most consistent, because their standard deviation (σ=28.2) is the smaller than that of A and C. Smaller standard deviation means less variations among the values, or more consistence.
Part B: High school A has the highest average attendance, because it has higher mean (82) than B and C. Mean is mathematically the same as average, total number of days attended by all students divided by the number of students.
Answer:
n = nickels, q = quarters
Equation 1: n+q=30
Equation 2: 0.05n+0.25q = 3.30
Step-by-step explanation:
From equation 1, n = 30-q
Substitute in Equation 2:
0.05(30-q) + 0.25q = 3.30
1.5 - 0.05q + 0.25q = 3.30
0.2q = 1.8
q = 9
Substitute in new equation:
n = 30-9
n = 21
It is important to note a nickel is worth 5 cents and a quarter is 25 cents. This helps us build the equations.
1. Total area of water = 352,000,000 + 9 * 10^6
= 352,000,000 + 9,000,000 = 361,000,000 = 3.61 * 10^8
Fraction of the surface covered by water = 3.61 * 10^8 / 5.1 * 10^8
= 3.61 / 5.1 = 0.707843 = 70.78 % to nearest hundredth of a percent.
