<span>A.The Sahara was a savanna
Northern Africa was a place of trees, grasslands, lakes and people. Today, it is the Sahara — a desolate area larger area than Australia.
Lake Yoa, in northeastern Chad, has remained a lake through the millennia and is still a lake today, surrounded by hot desert. Although little rain falls, Lake Yoa’s water is replenished from an underground aquifer.
By analyzing thousands of layers sediment in a core drilled from the bottom of this lake, an international team of scientists has reconstructed the region’s climate as the savanna changed to Sahara.</span>
Answer:
is not quadratic
Explanation:
Given

Required
Determine if it is quadratic
We have:

Open brackets

Collect like terms


A quadratic equation is represented as:

Hence:
is not quadratic
The most stress and unhappiness in her marriage is during
the childrearing years by which Margo will have no time for herself as she is
too busy taking care of her children and the responsibilities that she needs to
do as a wife and as a mother.
Answer:
Informed consent and anonymity
Explanation:
This researcher has violated the anonymous and informed consent clause. Informed consent has to do with participants knowing the reasons for the informations they provide before they give it out. This researcher was not honest with the students because what he told them he needed the emails for was different from what he ended up using them for. He breached the anonymous clause and the privacy of the students by doing this.
This line belongs to Act IV, scene iii of <em>Romeo and Ju.liet</em>.
In this scene, Ju.liet is about to drink the vial of potion that will make her appear dead. She knows that, after she does, she will be taken to the cript where all her dead relatives are buried. She worries about what will happen if the potion does not work. In these lines, she wonders what it would be like to be alive and wake up in the tomb. She thinks of the death and night that would surround her, as well as the bones of all her ancestors, and she is filled with fear at the prospect of this happening.