Question

Women’s records in the women’s 1500-m run. The formula

R =−0.0026? + 4.0807

can be used to predict the world record, in minutes, for the 1500-m run t years after 1900. Determine (in terms of an inequality) those years for which the world record will be less than 3.8 min.

Answer 1

- 0.0026 t + 4.0807 <3.8
-0.0026t < -0.2807
0.0026t > 0.2807
t > 0.2807/0.0026
t>107.96

Answer 2

can you explain how you got that, simply lol

Answer 3

i'll explain but is it ? or t

Answer 4

? or t? what ya mean

Answer 5

in the formula R u have typed ? after 0.0026, what is it

Answer 6

oh its a ? not a letter. i just rechecked the question

Answer 7

if ? implies the number of years world record will be less than 3.8 min.
which is R in the problem, we should take < inequality and establish the result