Milton Anderson
2022-09-17
Answered

Rewrite the vector equation $$r(t)=(3+t)i+(4\u2013t)j+(5\u20135t)k$$ as the corresponding parametric equations for the line.

You can still ask an expert for help

asked 2020-10-18

Find a least squares solution of Ax=b by constructing and solving the normal equations.

$A=\left[\begin{array}{cc}3& 1\\ 1& 1\\ 1& 4\end{array}\right],b\left[\begin{array}{c}1\\ 1\\ 1\end{array}\right]$

$\stackrel{\u2015}{x}=$ ?

asked 2021-05-13

A movie stuntman (mass 80.0kg) stands on a window ledge 5.0 mabove the floor. Grabbing a rope attached to a chandelier, heswings down to grapple with the movie's villian (mass 70.0 kg), whois standing directly under the chandelier.(assume that thestuntman's center of mass moves downward 5.0 m. He releasesthe rope just as he reaches the villian).

a) with what speed do the entwined foes start to slide acrossthe floor?

b) if the coefficient of kinetic friction of their bodies withthe floor is 0.250, how far do they slide?

asked 2022-08-04

From time t=0, with t in years, a $1200 deposit in a bandkaccount grows accorkding to the formula B=1200(exponential)0.03t

a)what is the balance in the account at the of 100years?

b)when does the balance first go over $50,000?

a)what is the balance in the account at the of 100years?

b)when does the balance first go over $50,000?

asked 2022-09-23

Simplify:

(1/4 2nd power divided (2 1/2 -3/4) +5/7)

(1/4 2nd power divided (2 1/2 -3/4) +5/7)

asked 2022-08-08

A collection of 30 coins worth $5.50 consists of nickels,dimes and quarters. There are twice as many dimes as nickels. Howmany quarters are there?

asked 2022-09-13

An member of congress’s approval rating starts at 45%. After a scandal, his approval rating decreases by 30%. Then, he passes a popular bill, and his approval rating increases by 30%. What is his final approval rating? Is he as popular as he was at the start?

asked 2022-09-11

Solve the Equation

$$2{\mathrm{cos}}^{2}x+\mathrm{cos}x-1=0$$

$$2{\mathrm{cos}}^{2}x+\mathrm{cos}x-1=0$$