The country a consumer price index is approximated by the following formula, where t represents the number of years after 1990.
a(t)=100e^0.023t
for instance, since a(16) is about 144, the amount of goods that could be purchased for $100 in 1990 cost about $144 in 2006. use the function to determine the year during which costs will be 90% higher than in 1990.

Carley bought a jacket that was discounted 10% off the original price. the expression below represents the discounted price in dollars, based on x, the original price of the jacket.

Write the equation in logarithmic form e^x=403.429

The bottom of ignacio's desktop is 74.5cm from the floor. ignacio's sits in his adjustable chair, and the tops of his legs are 49.3cm from the floor. each clockwise rotation of the knob on the chair raises ignacio's legs by 4.8cm. write an inequality to determine the number of clockwise rotations, r, ignacio could make with the knob without his legs touching the desk