Which best describes the purpose of a controlled experiment? to make sure the results of the experiment support the hypothesis to prevent a dangerous condition resulting from a reaction to examine whether one variable causes a change in another to prevent an undesired change in a variable

the rocket cannot penetrate the ground, in a contextual sense, therefore the roots of this equation should be the domain of this function. i'll let you find the roots of this quadratic equation (hint: use the quadratic formula:  

1- c

2-a

step-by-step explanation:

mark brainliest!

answer: they are supplementary angles

step-by-step explanation: 161+19=180. supplementary angles equal 180 degrees

$320 to $405

step by step explanation:

in one day he earns between $64 and $81

therefore if he works for 5 days, he will earn between 64 x 5 to 81 x 5

= $320 to $405