collard

if x+1 is a factor of ax^4+bx^2+c, what is the value of a+b+c?

A grandfather clock shows a time of 7 o’clock. What is the exact radian measure of the angle between the hour hand and the minute hand? how is it calculated?*

let me rewrite the question: the height,h, in metres, of a weather balloon above the ground after t seconds can be modelled by the function h(t)=-2t^3+3t^2+149+410, for 0<t<10. when is the balloon exactly 980 m above the ground my bad i messed up the numb...

its *h(t)=-2t^3+3t^2+149t+410,

where do we get the 570 from?

its kind of confusing