How to write 300,000+40,00+60+7 in standard form

Suppose a pendulum is l meters long. the time,t,in seconds that it tales to swing back and forth once is given by t=2.01

Which of the expressions (on the photo document i inserted) together represent all solutions to the following equation? 8cos(12x)+4=-4 *the answer should be in degrees.* > i would like for someone to explain the process to find the solutions for this.

The sum of these consecutive integers is equal to 9 less than 4 times the least of the integer. find the three integers