Evaluate the inverse laplace transform f(t)
a) l = { 20}
b) l^{-1}=\begin{bmatrix} \frac{-2s+6}{s^2+4} \end{bmatrix}

Arley is building a model of a city map. in one part of the city, three roads form a right triangle, which harley draws as triangle abc, with the following measures: m∠b=90° and m∠a=30°. in his scale model, the hypotenuse of triangle abc, ac¯¯¯¯¯¯¯¯, has a length of 817−−√ cm. what is the value of a (the length of bc¯¯¯¯¯¯¯¯)?

Name each raycalculation tip: in ray "ab", a is the endpoint of the ray.

Angie has saved 3/8 of the amount she needs to buy a bike. clive has saved 7/10 of the amount he needs to buy a skateboard. what is the difference between clive's and angie's fraction of savings?