Answer:
30
Step-by-step explanation:
pythagoras theorem
x
=900
x=30
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The predicted value of hardness at 37 hours is 243.87 and an 85% confidence interval for the mean hardness is (242.12, 245.61). At 41 hours, the predicted hardness is 252 and an 85% confidence interval for mean hardness is (249.83, 254.18). The confidence interval for X is equals to 41 which is wider because the value 41 is farther away from the sample mean X than is 37. As an outcome, the standard error for the prediction is larger.
Its wanting you to find the answer im guessing ?
like (3+6) x 121
Add the Numbers
9x 121
Multiply the Numbers
and the answer would be 1089 ?
I hope Helped you
- Dante
5 x 5 = 25
25 x 6 = 150
150cm^2