I'm on vacation and i need it's says write numerical expressions 8 fewer than 21

Which of the following graphs represents the function f(x) = 2^x

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¯¯¯¯¯¯¯¯)?

Compare the cost of the bike trips from the two companies shown.for both the cost in a linear function of the number of days which statements is true