3. In a running race, the times of 80 competitors were recorded. Complete the cumulative frequency table. Draw a cumulative frequency graph of the data. Using the graph estimate the median time. Time t (minutes) Frequency Cumulative frequency 30 < t < 35 7 35 < t < 40 13 40 < t < 45 18 45 < t < 50 25 50 < t < 55 12 55 < t < 60 5

x = 25/2304

step-by-step explanation:

3/5

step-by-step explanation:

double number line is not a standard concept, so it must have been defined in your textbook. assume top line is numerator.

"standard form:

3x2 + 14x − 10 = 0

solutions based on quadratic formula:

x1   = −14 − √ 142 − 4×3×(−10) /   2×3   = −14 − 2 × √ 79 /   6   ≈ −5.296

x2   = −14 + √ 142 − 4×3×(−10) /   2×3   = −14 + 2 × √ 79 /   6   ≈ 0.629