Can someone tell me what does 1e+23 means in number form?

The table below shows the height of a ball  x  seconds after being kicked.  what values, rounded to the nearest whole number, complete the quadratic regression equation that models the data? f(x)  =  x2  +  x  +  0based on the regression equation and rounded to the nearest whole number, what is the estimated height after 0.25 seconds?   feet

How can the correlation in the scatter plot graph below best be described? positive correlation negative correlation both positive and negative no correlation

Alicia puts $400 in a bank account. each year the account earns 5% simple interest. how much money will be in her bank account in six months?