Can someone help..? thanks

Mathematics

1 answer:

Serjik [45]3 years ago

4 0

Answer:

2.2*10^5

Step-by-step explanation:

to write a # in scientific notation change the # to decimal form.

so 2.2

then move the decimal point to the right until you get the original #

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Step 1:

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$\angle DBC+\angle ABC=180(\text{ sum of angles on a straight line)}$ $\angle ABC=65^0$ $\begin{gathered} \angle DBC+\angle ABC=180 \\ \angle DBC+65^0=180^0 \\ \angle DBC=180^0-65^0 \\ \angle DBC=115^0 \end{gathered}$

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By substituting the values, we will have

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Hence,

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