Can someone tell me how to do this and how to find the answer?

in one kind of butterfly, brown color is caused by a dominant allele, b, and a white color is caused by a recessive allele, b,. the table shows the observed numbers of phenotypes in a population of 100 butterflies.

of individuals
brown 84
white 16

what is the frequency of the heterozygous genotype in this population of butterflies?
a: 0.24
b: 0.36
c: 0.48
d: 0.60

Which of the following is a good strategy when it comes to desserts

How do you think earths interior affects what is happening on the surface? 2. how do fossils support the continental drift hypothesis? 3. how does sea- floor spreading support the hypothesis of continental drift? 4.what do scientists observe when they studied the magnetic fields of rocks on the sides of mid-ocean ridges? 5. what is a tectonic plate ? 6. explain mantle convection 7.how can movements of the continents affect earths climate? 8. what occurs during drifting?

Alexa is preparing for a presentation by creating note cards identifying keywords that describe various features of each type of plate boundary. which words apply to all three of the convergent boundaries?