The motor oil in a car‘s engine will accumulate dirt over time it is recommended that the oil in the car is motor be changed regularly car mechanics to use an instrument called A hydrometer to determine if the oil needs to be changed explain the steps in using a hydrometer and how I generally use a specific gravity to test the motor oil for dirt

in the year 2850, humans successfully colonized mars. the martian modules that were constructed could hold only a small population of people. it is now a century later, and the population on mars has grown to 600 people. of the current mars population, 45 people express the recessive phenotype for phenylketon- uria (pku) syndrome (pp genotype).

explanation:

she will be charged $6

step-by-step explanation:

48 dollars divided by 200 beads equals .24 dollars a bead

.24 multiplied by 25 more beads equals 6 dollars as the total cost