Which statements about the graph of the function f(x) = -x2 - 4x + 2 are true? select three options.
the domain is {x|x s-2}.
the range is {yly s 6).
the function is increasing over the interval (-00,-2).
the function is decreasing over the interval (-4,
the function has a positive y-intercept.

The average human heart beats 1.15 \cdot 10^51.15⋅10 5 1, point, 15, dot, 10, start superscript, 5, end superscript times per day. there are 3.65 \cdot 10^23.65⋅10 2 3, point, 65, dot, 10, start superscript, 2, end superscript days in one year.how many times does the heart beat in one year? write your answer in scientific notation, and round to one decimal place.

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¯¯¯¯¯¯¯¯)?

The table shows the balance of a money market account over time. write a function that represents the balance y(in dollars) after t years.