Answer:
1) 70
2) 102
Step-by-step explanation:
We use unit rates in everyday day life, and it’s become quite useful. For example... : we use them to know how far a car or person can go ( with ) - a certain amount of time.
Unit Rates : When rates are expressed as a quantity of 1, such as 2 feet per second or 5 miles per hour.
Answer:
c) -2n - n + 5 because if there's no number in front of a variable, the coefficient is 1, and since n is negative, the coefficient is -1
The relationship between the limit of a function and a definite integral on a given integral is given by:
![\int\limits^b_a {f(x)} \, dx = \lim_{n \to \infty} \Sigma_{n=1}^nf(x_i)\delta x,\ \ [a,\ b]](https://tex.z-dn.net/?f=%20%5Cint%5Climits%5Eb_a%20%7Bf%28x%29%7D%20%5C%2C%20dx%20%3D%20%5Clim_%7Bn%20%5Cto%20%5Cinfty%7D%20%5CSigma_%7Bn%3D1%7D%5Enf%28x_i%29%5Cdelta%20x%2C%5C%20%5C%20%5Ba%2C%5C%20b%5D)
Given
![\lim_{n \to \infty} \frac{\cos x_i}{x_i} \delta x,\ \ [2\pi,\ 3\pi]](https://tex.z-dn.net/?f=%20%5Clim_%7Bn%20%5Cto%20%5Cinfty%7D%20%20%5Cfrac%7B%5Ccos%20x_i%7D%7Bx_i%7D%20%20%5Cdelta%20x%2C%5C%20%5C%20%5B2%5Cpi%2C%5C%203%5Cpi%5D)
, the equivalent definite integral is:
