how that, if is small enough for its cube and higher powers to be neglected, . by putting ,show that . [5mks](b)If is so small that its fourth and higher powers may be neglected show that and find the numbers and .Hence by putting show that the sum of the fourth roots of and of is approximat​

a. the residual plot for model 1 has a random pattern and is a good fit for the data.

50.6

step-by-step explanation:

c.

step-by-step explanation:

she should of added 9^2 and 12^2. that is because it is a^2+b^2=c^2. c^2 is the hypotenuse and should always be bigger than the other two numbers. which is why she should of added 9 squared and 12 squared together instead of 15 squared.

it’s the first one your welcome