Bacteria grown in a lab experience what is called an 'exponential phase' of population growth. Suppose that, during this phase, a colony of Mycobacterium tuberculosis you are growing has a per capita growth rate, r, of 0.063 per hour. If the size of your colony at the start of the exponential phase is 0.25 billion cells, then approximately how large will it be in 48 hours?

b. the carbon cycle ensures living things have a source of hydrogen

the electromagnetic energy from the sun arrives in the form of visible and invisible light.

hydrogen is a compound or a single element and a element is a pure substence that cannot be separated into simpler subtances

clorine is a compound its a chemical substance that forms when two or more different elements combine

so both hydrogen and clorine are compounds