A microscope allows a scientist to view bacteria at four times their actual size using its
lowest magnification lens.
With each lens added to the microscope, the size of the image increases.
The size of the image y in comparison to its original size after x magnification lenses are
added is represented by y = 4(2)*.
How many more lenses should be added so the new image is 128 times the original size?

2÷6+1/2 to the second power plus one

Let w=23 . what is the value of w + 45 ?

Researchers were interested in whether relaxation training decreases the number of headaches a person experiences. they randomly assigned 20 participants to a control group or a relaxation training group and noted the change in number of headaches each group reported from the week before training to the week after training. which statistical analysis should be performed to answer the researchers' question?