Will give a brainliest if ur 100% right

the american college of sports medicine recommends exercising at an intensity of 60% to 90% of your maximum heart rate.

age
20-24
25-29
30-34
33-39
40-44

maximum heart rate
200
195
190
185
180

target range
120-180
117-176
114-171
111-167
108-162

rudy is 42 years old. write an inequality to represent at least 70% of his maximum heart rate.

a.
x ≥ 70+180 or x ≥ 250
b.
x ≥ 0.07 * 180 or x ≥ 12.6
c.
x ≥ 0.7 * 180 or x ≥ 126
d.
x ≥ 180-70 or x ≥ 110