Recent content by conniebear14

Okay so I calculated probability person does not buy as .8 from (1-.56)(.25) + (.92)(.75). But now I am stuck. Where does the five part come in? What should I do next?

it didn't post the numbers but the blanks correspond to 56% and 8% respectively

Homework Statement A company has been running a television advertisement for one of its new products. A survey was conducted. Based on its results, it was concluded that an individual buys the product with probability...

Okay, for this problem let's not take gravity into account. Are my equations correct? Can I use the same approach that I used for a horizontal spring?

Homework Statement A mass m=.25 kg is suspended from an ideal Hooke's law spring which has a spring constant k=10 N/m. If the mass moves up and down in the Earth's gravitational field near Earth's surface find period of oscillation. Homework Equations T=1/f period equals one over...

okay so PE is mgdeltaY? Where do I go from there? I set .5mv^2 = mgdeltaY and got deltaY = (v^2)/2g

I don't know what that means (lhs and rhs). That was the only equation I could think of. The horizontal plus a ramp is what is messing me up. Which equations would you recommend?

Homework Statement An object of mass m and initial speed v0 sliding on a horizontal frictionless surface encounters a frictionless ramp. To what vertical height will the object rise before coming to rest? Homework Equations .5mv^2 = .5mgh The Attempt at a Solution I used above...

I'm supposed to find the integral of f(x) = (e^5x) / (1+(e^10x)) from negative infinity to 0. I know how to set up the integral as the limit as t approaches -∞ of ∫f(x) from t to 0, but I'm stuck on how to actually solve the integral. I've tried by parts and u-sub but I just can't seem to get...